diff --git a/.circleci/config.yml b/.circleci/config.yml
index 7867024..534ee0d 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -49,14 +49,11 @@ jobs:
           rustc --version
           cargo --version
           cargo test --all-features -- --test-threads 1
-    # TODO(tarcieri): upgrade cargo-audit and/or yubihsm-rs
-    # Audit is failing on RUSTSEC-2016-0004 and cargo-audit is too old to
-    # support the --ignore option
-    #- run:
-    #    name: audit
-    #    command: |
-    #      cargo audit --version
-    #      cargo audit
+    - run:
+        name: audit
+        command: |
+          cargo audit --version
+          cargo audit
     - run:
         name: validate against test harness
         command: |
diff --git a/Cargo.lock b/Cargo.lock
index eee455e..9dc7f48 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -12,7 +12,7 @@ dependencies = [
  "generational-arena 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "gumdrop 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "secrecy 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -37,6 +37,19 @@ dependencies = [
  "synstructure 0.12.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "adler32"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "aead"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "generic-array 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "aes"
 version = "0.3.2"
@@ -106,35 +119,35 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "backtrace"
-version = "0.3.38"
+version = "0.3.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "backtrace-sys 0.1.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "backtrace-sys 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)",
  "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-demangle 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "backtrace-sys"
-version = "0.1.30"
+version = "0.1.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cc 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.41 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "bit-set"
-version = "0.2.0"
+version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "bit-vec 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bit-vec 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "bit-vec"
-version = "0.6.1"
+version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -187,6 +200,11 @@ dependencies = [
  "byte-tools 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "bumpalo"
+version = "2.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "byte-tools"
 version = "0.2.0"
@@ -227,7 +245,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "cc"
-version = "1.0.35"
+version = "1.0.41"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -235,12 +253,33 @@ name = "cfg-if"
 version = "0.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "chacha20"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "salsa20-core 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "stream-cipher 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "chacha20poly1305"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "aead 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "chacha20 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "poly1305 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "zeroize 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "chrono"
 version = "0.4.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
  "num-integer 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)",
  "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -257,7 +296,7 @@ name = "clear_on_drop"
 version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cc 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.41 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -278,6 +317,14 @@ dependencies = [
  "dbl 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "crc32fast"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "crypto-mac"
 version = "0.7.0"
@@ -355,6 +402,14 @@ dependencies = [
  "generic-array 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "ed25519"
+version = "1.0.0-pre.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "signature 1.0.0-pre.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "ed25519-dalek"
 version = "1.0.0-pre.2"
@@ -377,7 +432,7 @@ name = "failure"
 version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "backtrace 0.3.38 (registry+https://github.com/rust-lang/crates.io-index)",
+ "backtrace 0.3.40 (registry+https://github.com/rust-lang/crates.io-index)",
  "failure_derive 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -397,6 +452,17 @@ name = "fake-simd"
 version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "filetime"
+version = "0.2.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
+ "redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "fnv"
 version = "1.0.6"
@@ -407,15 +473,6 @@ name = "fuchsia-cprng"
 version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
-name = "gaunt"
-version = "0.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "failure 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "failure_derive 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "generational-arena"
 version = "0.2.3"
@@ -446,7 +503,7 @@ version = "0.1.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
  "wasi 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -468,6 +525,11 @@ dependencies = [
  "syn 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "harp"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "hashbrown"
 version = "0.1.8"
@@ -477,6 +539,14 @@ dependencies = [
  "scopeguard 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "heck"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "unicode-segmentation 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "hex"
 version = "0.3.2"
@@ -487,10 +557,10 @@ name = "hidapi"
 version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cc 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.41 (registry+https://github.com/rust-lang/crates.io-index)",
  "failure 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "failure_derive 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
  "pkg-config 0.3.16 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -544,7 +614,7 @@ name = "iovec"
 version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -560,6 +630,14 @@ name = "itoa"
 version = "0.4.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "js-sys"
+version = "0.3.28"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "wasm-bindgen 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "kernel32-sys"
 version = "0.2.2"
@@ -584,7 +662,7 @@ dependencies = [
  "hex 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "hidapi 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
  "nix 0.13.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "quick-error 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -604,26 +682,31 @@ dependencies = [
 
 [[package]]
 name = "libc"
-version = "0.2.62"
+version = "0.2.65"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
-name = "libusb"
-version = "0.3.0"
+name = "libflate"
+version = "0.1.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "bit-set 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
- "libusb-sys 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "adler32 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crc32fast 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rle-decode-fast 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "take_mut 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
-name = "libusb-sys"
-version = "0.2.3"
+name = "libusb1-sys"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.41 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libflate 0.1.27 (registry+https://github.com/rust-lang/crates.io-index)",
  "pkg-config 0.3.16 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tar 0.4.26 (registry+https://github.com/rust-lang/crates.io-index)",
+ "vcpkg 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -658,9 +741,9 @@ version = "0.13.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "cc 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.41 (registry+https://github.com/rust-lang/crates.io-index)",
  "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
  "void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -670,12 +753,21 @@ version = "0.14.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "cc 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.41 (registry+https://github.com/rust-lang/crates.io-index)",
  "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
  "void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "nom"
+version = "4.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "memchr 2.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "version_check 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "num-integer"
 version = "0.1.41"
@@ -720,7 +812,7 @@ name = "parking_lot_core"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "smallvec 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -746,6 +838,14 @@ name = "pkg-config"
 version = "0.3.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "poly1305"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "universal-hash 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "ppv-lite86"
 version = "0.2.5"
@@ -817,7 +917,7 @@ version = "0.4.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "fuchsia-cprng 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rdrand 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -829,7 +929,7 @@ version = "0.6.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "autocfg 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_chacha 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_hc 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -847,7 +947,7 @@ version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "getrandom 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_chacha 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_hc 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -921,7 +1021,7 @@ name = "rand_jitter"
 version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -933,7 +1033,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "fuchsia-cprng 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rdrand 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -995,27 +1095,42 @@ dependencies = [
 
 [[package]]
 name = "ring"
-version = "0.14.6"
+version = "0.16.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cc 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.41 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
  "spin 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "untrusted 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "untrusted 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "web-sys 0.3.28 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "rle-decode-fast"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "rpassword"
 version = "3.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "rusb"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "bit-set 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libusb1-sys 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "rustc-demangle"
 version = "0.1.16"
@@ -1034,6 +1149,15 @@ name = "ryu"
 version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "salsa20-core"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "stream-cipher 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "zeroize 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "scopeguard"
 version = "0.3.3"
@@ -1041,10 +1165,11 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "secp256k1"
-version = "0.13.0"
+version = "0.15.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cc 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.41 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1125,7 +1250,7 @@ name = "signal-hook"
 version = "0.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
  "signal-hook-registry 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1135,7 +1260,7 @@ version = "1.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "arc-swap 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1157,62 +1282,79 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "generic-array 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "getrandom 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "sha2 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "signature 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "subtle-encoding 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "zeroize 0.9.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "signatory"
+version = "0.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "ed25519 1.0.0-pre.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "generic-array 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "getrandom 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "sha2 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "signature 1.0.0-pre.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "subtle-encoding 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "zeroize 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "signatory-dalek"
-version = "0.12.0"
+version = "0.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "digest 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "ed25519-dalek 1.0.0-pre.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "sha2 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "signatory 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "signatory 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "signatory-ledger-tm"
-version = "0.12.0"
+version = "0.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "ledger-tendermint 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
- "signatory 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "signatory 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "signatory-secp256k1"
-version = "0.12.0"
+version = "0.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "secp256k1 0.13.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "signatory 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "signature 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "secp256k1 0.15.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "signatory 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "signature 1.0.0-pre.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "signature"
 version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "signature"
+version = "1.0.0-pre.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "digest 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "signature_derive 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "signature_derive 1.0.0-pre.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "signature_derive"
-version = "0.2.1"
+version = "1.0.0-pre.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.15.44 (registry+https://github.com/rust-lang/crates.io-index)",
- "synstructure 0.10.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "synstructure 0.12.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1220,11 +1362,24 @@ name = "smallvec"
 version = "0.6.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "sourcefile"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "spin"
 version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "stream-cipher"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "generic-array 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "strsim"
 version = "0.9.2"
@@ -1250,6 +1405,14 @@ dependencies = [
  "zeroize 0.9.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "subtle-encoding"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "zeroize 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "syn"
 version = "0.14.9"
@@ -1311,6 +1474,22 @@ dependencies = [
  "failure 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "take_mut"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "tar"
+version = "0.4.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "filetime 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
+ "redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)",
+ "xattr 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "tempdir"
 version = "0.3.7"
@@ -1326,7 +1505,7 @@ version = "3.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)",
  "remove_dir_all 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1335,7 +1514,7 @@ dependencies = [
 
 [[package]]
 name = "tendermint"
-version = "0.10.0"
+version = "0.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1376,7 +1555,7 @@ name = "time"
 version = "0.1.42"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
  "redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -1415,6 +1594,7 @@ dependencies = [
  "atomicwrites 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "chacha20poly1305 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "chrono 0.4.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "failure 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "gumdrop 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1427,23 +1607,22 @@ dependencies = [
  "prost-amino-derive 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_os 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "ring 0.14.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "rpassword 3.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.41 (registry+https://github.com/rust-lang/crates.io-index)",
  "sha2 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "signatory 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "signatory-dalek 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "signatory-ledger-tm 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "signatory-secp256k1 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "signatory 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "signatory-dalek 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "signatory-ledger-tm 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "signatory-secp256k1 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "subtle 2.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "subtle-encoding 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "subtle-encoding 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "tempfile 3.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "tendermint 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tendermint 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "tiny-bip39 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "wait-timeout 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "x25519-dalek 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "yubihsm 0.26.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "yubihsm 0.28.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "zeroize 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1476,6 +1655,11 @@ dependencies = [
  "smallvec 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "unicode-segmentation"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "unicode-xid"
 version = "0.1.0"
@@ -1486,9 +1670,18 @@ name = "unicode-xid"
 version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "universal-hash"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "generic-array 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "subtle 2.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "untrusted"
-version = "0.6.2"
+version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -1509,6 +1702,16 @@ dependencies = [
  "serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "vcpkg"
+version = "0.2.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "version_check"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "void"
 version = "1.0.2"
@@ -1519,7 +1722,7 @@ name = "wait-timeout"
 version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1527,6 +1730,90 @@ name = "wasi"
 version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "wasm-bindgen"
+version = "0.2.51"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "wasm-bindgen-macro 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "wasm-bindgen-backend"
+version = "0.2.51"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "bumpalo 2.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "wasm-bindgen-shared 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "wasm-bindgen-macro"
+version = "0.2.51"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "wasm-bindgen-macro-support 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "wasm-bindgen-macro-support"
+version = "0.2.51"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "wasm-bindgen-backend 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)",
+ "wasm-bindgen-shared 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "wasm-bindgen-shared"
+version = "0.2.51"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "wasm-bindgen-webidl"
+version = "0.2.51"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "failure 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "heck 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "wasm-bindgen-backend 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)",
+ "weedle 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "web-sys"
+version = "0.3.28"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "failure 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "js-sys 0.3.28 (registry+https://github.com/rust-lang/crates.io-index)",
+ "sourcefile 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "wasm-bindgen 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)",
+ "wasm-bindgen-webidl 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "weedle"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "nom 4.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "winapi"
 version = "0.2.8"
@@ -1583,9 +1870,17 @@ dependencies = [
  "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "xattr"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "yubihsm"
-version = "0.26.4"
+version = "0.28.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "aes 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1593,27 +1888,22 @@ dependencies = [
  "block-modes 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "chrono 0.4.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "cmac 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "failure 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "failure_derive 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "gaunt 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
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@@ -1772,13 +2074,16 @@ dependencies = [
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@@ -1791,26 +2096,33 @@ dependencies = [
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@@ -1820,14 +2132,26 @@ dependencies = [
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-"checksum untrusted 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)" = "55cd1f4b4e96b46aeb8d4855db4a7a9bd96eeeb5c6a1ab54593328761642ce2f"
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+"checksum web-sys 0.3.28 (registry+https://github.com/rust-lang/crates.io-index)" = "c84440699cd02ca23bed6f045ffb1497bc18a3c2628bd13e2093186faaaacf6b"
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@@ -1836,7 +2160,8 @@ dependencies = [
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diff --git a/Cargo.toml b/Cargo.toml
index 936e37c..f33808d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -18,6 +18,7 @@ abscissa_core = "0.4"
 atomicwrites = "0.2"
 byteorder = "1.2"
 bytes = "0.4"
+chacha20poly1305 = "0.2"
 chrono = "0.4"
 failure = "0.1"
 gumdrop = "0.7"
@@ -29,25 +30,24 @@ log = "0.4"
 prost-amino = "0.4.0"
 prost-amino-derive = "0.4.0"
 rand_os = "0.1"
-ring = "0.14"
 rpassword = { version = "3", optional = true }
 serde = { version = "1", features = ["serde_derive"] }
 serde_json = "1"
 sha2 = "0.8"
-signatory = { version = "0.12", features = ["ed25519", "ecdsa"] }
-signatory-dalek = "0.12"
-signatory-secp256k1 = "0.12"
-signatory-ledger-tm = { version = "0.12", optional = true }
+signatory = { version = "0.15", features = ["ecdsa", "ed25519", "encoding"] }
+signatory-dalek = "0.15"
+signatory-secp256k1 = "0.15"
+signatory-ledger-tm = { version = "0.15", optional = true }
 subtle = "2"
-subtle-encoding = { version = "0.3", features = ["bech32-preview"] }
+subtle-encoding = { version = "0.4", features = ["bech32-preview"] }
 tiny-bip39 = "0.6"
 wait-timeout = "0.2"
 x25519-dalek = "0.5"
-yubihsm = { version = "0.26", features = ["setup", "usb"], optional = true }
+yubihsm = { version = "0.28", features = ["setup", "usb"], optional = true }
 zeroize = "1"
 
 [dependencies.tendermint]
-version = "0.10"
+version = "0.10.1"
 features = ["amino-types", "config"]
 
 [dev-dependencies]
diff --git a/src/commands/softsign/import.rs b/src/commands/softsign/import.rs
index 141ec7e..b035b9f 100644
--- a/src/commands/softsign/import.rs
+++ b/src/commands/softsign/import.rs
@@ -2,7 +2,10 @@
 
 use crate::{config::provider::softsign::KeyFormat, keyring::SecretKeyEncoding, prelude::*};
 use abscissa_core::{Command, Runnable};
-use signatory::{ed25519, Decode, Encode};
+use signatory::{
+    ed25519,
+    encoding::{Decode, Encode},
+};
 use std::{path::PathBuf, process};
 use subtle_encoding::IDENTITY;
 use tendermint::{config::PrivValidatorKey, PrivateKey};
@@ -54,7 +57,10 @@ impl Runnable for ImportCommand {
                     .priv_key;
 
                 match private_key {
-                    PrivateKey::Ed25519(pk) => pk.to_seed(),
+                    PrivateKey::Ed25519(pk) => {
+                        // TODO(tarcieri): upgrade Signatory version
+                        ed25519::Seed::from_bytes(pk.to_seed().as_secret_slice()).unwrap()
+                    }
                 }
             }
             KeyFormat::Raw => {
diff --git a/src/commands/softsign/keygen.rs b/src/commands/softsign/keygen.rs
index 9c18872..a39c345 100644
--- a/src/commands/softsign/keygen.rs
+++ b/src/commands/softsign/keygen.rs
@@ -2,7 +2,7 @@
 
 use crate::{keyring::SecretKeyEncoding, prelude::*};
 use abscissa_core::{Command, Runnable};
-use signatory::{ed25519, Encode};
+use signatory::{ed25519, encoding::Encode};
 use std::{path::PathBuf, process};
 
 /// `keygen` command
diff --git a/src/commands/yubihsm/setup.rs b/src/commands/yubihsm/setup.rs
index c5dd2b6..e39721e 100644
--- a/src/commands/yubihsm/setup.rs
+++ b/src/commands/yubihsm/setup.rs
@@ -156,7 +156,7 @@ impl Runnable for SetupCommand {
             crate::yubihsm::config().auth.credentials(),
             profile,
         )
-        .unwrap_or_else(|e| hsm_error(e.as_fail()));
+        .unwrap_or_else(|e| hsm_error(&e));
 
         status_ok!(
             "Success",
@@ -489,7 +489,7 @@ fn prompt_for_user_approval(prompt: &str) {
 }
 
 /// Handler for HSM errors
-fn hsm_error(e: &dyn failure::Fail) -> ! {
+fn hsm_error(e: &dyn std::error::Error) -> ! {
     status_err!("HSM error: {}", e);
 
     // TODO: handle exits via abscissa
diff --git a/src/config/validator.rs b/src/config/validator.rs
index ed83e61..7587a20 100644
--- a/src/config/validator.rs
+++ b/src/config/validator.rs
@@ -5,7 +5,10 @@ use crate::{
     keyring::SecretKeyEncoding,
 };
 use serde::Deserialize;
-use signatory::{ed25519, Decode, Encode};
+use signatory::{
+    ed25519,
+    encoding::{Decode, Encode},
+};
 use std::path::PathBuf;
 use tendermint::{chain, net};
 
diff --git a/src/connection/secret_connection.rs b/src/connection/secret_connection.rs
index 37c3a8e..29fdacc 100644
--- a/src/connection/secret_connection.rs
+++ b/src/connection/secret_connection.rs
@@ -5,12 +5,19 @@ mod nonce;
 mod public_key;
 
 pub use self::{kdf::Kdf, nonce::Nonce, public_key::PublicKey};
+use crate::error::{Error, ErrorKind};
 use byteorder::{ByteOrder, LE};
 use bytes::BufMut;
+use chacha20poly1305::{
+    aead::{generic_array::GenericArray, NewAead},
+    ChaCha20Poly1305,
+};
 use prost::{encoding::encode_varint, Message};
 use rand_os::OsRng;
-use ring::aead;
-use signatory::{ed25519, Signature, Signer, Verifier};
+use signatory::{
+    ed25519,
+    signature::{Signature, Signer, Verifier},
+};
 use signatory_dalek::Ed25519Verifier;
 use std::{
     cmp,
@@ -18,10 +25,7 @@ use std::{
     marker::{Send, Sync},
 };
 use subtle::ConstantTimeEq;
-use tendermint::{
-    amino_types::AuthSigMessage,
-    error::{Error, ErrorKind},
-};
+use tendermint::amino_types::AuthSigMessage;
 use x25519_dalek::{EphemeralSecret, PublicKey as EphemeralPublic};
 
 /// Size of the MAC tag
@@ -37,8 +41,8 @@ pub struct SecretConnection<IoHandler: Read + Write + Send + Sync> {
     io_handler: IoHandler,
     recv_nonce: Nonce,
     send_nonce: Nonce,
-    recv_secret: aead::OpeningKey,
-    send_secret: aead::SealingKey,
+    recv_cipher: ChaCha20Poly1305,
+    send_cipher: ChaCha20Poly1305,
     remote_pubkey: PublicKey,
     recv_buffer: Vec<u8>,
 }
@@ -48,7 +52,7 @@ impl<IoHandler: Read + Write + Send + Sync> SecretConnection<IoHandler> {
     pub fn remote_pubkey(&self) -> PublicKey {
         self.remote_pubkey
     }
-    #[allow(clippy::new_ret_no_self)]
+
     /// Performs handshake and returns a new authenticated SecretConnection.
     pub fn new(
         mut handler: IoHandler,
@@ -94,13 +98,11 @@ impl<IoHandler: Read + Write + Send + Sync> SecretConnection<IoHandler> {
             recv_buffer: vec![],
             recv_nonce: Nonce::default(),
             send_nonce: Nonce::default(),
-            recv_secret: aead::OpeningKey::new(&aead::CHACHA20_POLY1305, &kdf.recv_secret)
-                .map_err(|_| ErrorKind::Crypto)?,
-            send_secret: aead::SealingKey::new(&aead::CHACHA20_POLY1305, &kdf.send_secret)
-                .map_err(|_| ErrorKind::Crypto)?,
+            recv_cipher: ChaCha20Poly1305::new(kdf.recv_secret.into()),
+            send_cipher: ChaCha20Poly1305::new(kdf.send_secret.into()),
             remote_pubkey: PublicKey::from(
                 ed25519::PublicKey::from_bytes(remote_eph_pubkey.as_bytes())
-                    .ok_or_else(|| ErrorKind::Crypto)?,
+                    .ok_or_else(|| ErrorKind::CryptoError)?,
             ),
         };
 
@@ -114,13 +116,15 @@ impl<IoHandler: Read + Write + Send + Sync> SecretConnection<IoHandler> {
             }
         };
 
-        let remote_pubkey =
-            ed25519::PublicKey::from_bytes(&auth_sig_msg.key).ok_or_else(|| ErrorKind::Crypto)?;
+        let remote_pubkey = ed25519::PublicKey::from_bytes(&auth_sig_msg.key)
+            .ok_or_else(|| ErrorKind::CryptoError)?;
         let remote_signature: &[u8] = &auth_sig_msg.sig;
-        let remote_sig = ed25519::Signature::from_bytes(remote_signature)?;
+        let remote_sig =
+            ed25519::Signature::from_bytes(remote_signature).map_err(|_| ErrorKind::CryptoError)?;
 
-        let remote_verifier = Ed25519Verifier::from(&remote_pubkey);
-        remote_verifier.verify(&kdf.challenge, &remote_sig)?;
+        Ed25519Verifier::from(&remote_pubkey)
+            .verify(&kdf.challenge, &remote_sig)
+            .map_err(|_| ErrorKind::CryptoError)?;
 
         // We've authorized.
         sc.remote_pubkey = PublicKey::from(remote_pubkey);
@@ -128,54 +132,59 @@ impl<IoHandler: Read + Write + Send + Sync> SecretConnection<IoHandler> {
         Ok(sc)
     }
 
-    /// Unseal (i.e. decrypt) AEAD authenticated data
-    fn open(&self, ciphertext: &[u8], out: &mut [u8]) -> Result<usize, Error> {
-        let nonce = aead::Nonce::from(&self.recv_nonce);
-        let associated_data = aead::Aad::empty();
-
-        // optimize if the provided buffer is sufficiently large
-        let len = if out.len() >= ciphertext.len() {
-            let in_out = &mut out[..ciphertext.len()];
-            in_out.copy_from_slice(ciphertext);
-
-            aead::open_in_place(&self.recv_secret, nonce, associated_data, 0, in_out)
-                .map_err(|_| ErrorKind::Crypto)?
-                .len()
-        } else {
-            let mut in_out = ciphertext.to_vec();
-            let out0 =
-                aead::open_in_place(&self.recv_secret, nonce, aead::Aad::empty(), 0, &mut in_out)
-                    .map_err(|_| ErrorKind::Crypto)?;
-            out[..out0.len()].copy_from_slice(out0);
-            out0.len()
-        };
-
-        Ok(len)
-    }
-
-    /// Seal (i.e. encrypt) AEAD authenticated data
-    fn seal(
+    /// Encrypt AEAD authenticated data
+    fn encrypt(
         &self,
         chunk: &[u8],
         sealed_frame: &mut [u8; TAG_SIZE + TOTAL_FRAME_SIZE],
     ) -> Result<(), Error> {
-        let chunk_length = chunk.len();
-        let mut frame = [0u8; TOTAL_FRAME_SIZE];
-        LE::write_u32(&mut frame[..DATA_LEN_SIZE], chunk_length as u32);
-        frame[DATA_LEN_SIZE..DATA_LEN_SIZE + chunk_length].copy_from_slice(chunk);
-        sealed_frame[..frame.len()].copy_from_slice(&frame);
-
-        aead::seal_in_place(
-            &self.send_secret,
-            aead::Nonce::from(&self.send_nonce),
-            aead::Aad::empty(),
-            sealed_frame,
-            TAG_SIZE,
-        )
-        .map_err(|_| ErrorKind::Crypto)?;
+        debug_assert!(chunk.len() <= TOTAL_FRAME_SIZE - DATA_LEN_SIZE);
+        LE::write_u32(&mut sealed_frame[..DATA_LEN_SIZE], chunk.len() as u32);
+        sealed_frame[DATA_LEN_SIZE..DATA_LEN_SIZE + chunk.len()].copy_from_slice(chunk);
+
+        let tag = self
+            .send_cipher
+            .encrypt_in_place_detached(
+                GenericArray::from_slice(self.send_nonce.to_bytes()),
+                b"",
+                &mut sealed_frame[..TOTAL_FRAME_SIZE],
+            )
+            .map_err(|_| ErrorKind::CryptoError)?;
+
+        sealed_frame[TOTAL_FRAME_SIZE..].copy_from_slice(tag.as_slice());
 
         Ok(())
     }
+
+    /// Decrypt AEAD authenticated data
+    fn decrypt(&self, ciphertext: &[u8], out: &mut [u8]) -> Result<usize, Error> {
+        // Ensure ciphertext is at least as long as a Poly1305 tag
+        if ciphertext.len() < TAG_SIZE {
+            return Err(ErrorKind::CryptoError.into());
+        }
+
+        // Split ChaCha20 ciphertext from the Poly1305 tag
+        let (ct, tag) = ciphertext.split_at(ciphertext.len() - TAG_SIZE);
+
+        // Return a length error if the output buffer is too small
+        if out.len() < ct.len() {
+            return Err(ErrorKind::CryptoError.into());
+        }
+
+        let in_out = &mut out[..ct.len()];
+        in_out.copy_from_slice(ct);
+
+        self.recv_cipher
+            .decrypt_in_place_detached(
+                GenericArray::from_slice(self.recv_nonce.to_bytes()),
+                b"",
+                in_out,
+                tag.into(),
+            )
+            .map_err(|_| ErrorKind::CryptoError)?;
+
+        Ok(in_out.len())
+    }
 }
 
 impl<IoHandler> Read for SecretConnection<IoHandler>
@@ -199,7 +208,7 @@ where
 
         // decrypt the frame
         let mut frame = [0u8; TOTAL_FRAME_SIZE];
-        let res = self.open(&sealed_frame, &mut frame);
+        let res = self.decrypt(&sealed_frame, &mut frame);
 
         if res.is_err() {
             return Err(io::Error::new(
@@ -255,7 +264,7 @@ where
                 data_copy = &[0u8; 0];
             }
             let sealed_frame = &mut [0u8; TAG_SIZE + TOTAL_FRAME_SIZE];
-            let res = self.seal(chunk, sealed_frame);
+            let res = self.encrypt(chunk, sealed_frame);
             if res.is_err() {
                 return Err(io::Error::new(
                     io::ErrorKind::Other,
@@ -315,7 +324,7 @@ fn share_eph_pubkey<IoHandler: Read + Write + Send + Sync>(
     // https://github.com/tendermint/tendermint/blob/013b9cef642f875634c614019ab13b17570778ad/p2p/conn/secret_connection.go#L208-L238
     let mut remote_eph_pubkey_fixed: [u8; 32] = Default::default();
     if buf[0] != 33 || buf[1] != 32 {
-        return Err(ErrorKind::Protocol.into());
+        return Err(ErrorKind::ProtocolError.into());
     }
     // after total length (33) and byte length (32), we expect the raw bytes
     // of the pub key:
@@ -394,7 +403,7 @@ fn sign_challenge(
 ) -> Result<ed25519::Signature, Error> {
     local_privkey
         .try_sign(challenge)
-        .map_err(|_| ErrorKind::Crypto.into())
+        .map_err(|_| ErrorKind::CryptoError.into())
 }
 
 // TODO(ismail): change from DecodeError to something more generic
@@ -406,19 +415,17 @@ fn share_auth_signature<IoHandler: Read + Write + Send + Sync>(
 ) -> Result<AuthSigMessage, Error> {
     let amsg = AuthSigMessage {
         key: pubkey.to_vec(),
-        sig: signature.into_bytes().to_vec(),
+        sig: signature.as_ref().to_vec(),
     };
     let mut buf: Vec<u8> = vec![];
-    amsg.encode_length_delimited(&mut buf)
-        .map_err(|e| Error::new(ErrorKind::Parse, Some(e.to_string())))?;
+    amsg.encode_length_delimited(&mut buf)?;
     sc.write_all(&buf)?;
 
     let mut rbuf = vec![0; 106]; // 100 = 32 + 64 + (amino overhead = 2 fields + 2 lengths + 4 prefix bytes + total length)
     sc.read_exact(&mut rbuf)?;
 
     // TODO: proper error handling:
-    Ok(AuthSigMessage::decode_length_delimited(&rbuf)
-        .map_err(|e| Error::new(ErrorKind::Parse, Some(e.to_string())))?)
+    Ok(AuthSigMessage::decode_length_delimited(&rbuf)?)
 }
 
 #[cfg(tests)]
diff --git a/src/connection/secret_connection/nonce.rs b/src/connection/secret_connection/nonce.rs
index fe6d43f..a4117fc 100644
--- a/src/connection/secret_connection/nonce.rs
+++ b/src/connection/secret_connection/nonce.rs
@@ -1,5 +1,4 @@
 use byteorder::{ByteOrder, LE};
-use ring::aead;
 
 /// Size of a ChaCha20 nonce
 pub const SIZE: usize = 12;
@@ -27,12 +26,6 @@ impl Nonce {
     }
 }
 
-impl From<&Nonce> for aead::Nonce {
-    fn from(nonce: &Nonce) -> aead::Nonce {
-        aead::Nonce::assume_unique_for_key(nonce.0)
-    }
-}
-
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -54,12 +47,9 @@ mod tests {
 
         for i in 0..1024 {
             nonce.increment();
-            match check_points.get(&i) {
-                Some(want) => {
-                    let got = &nonce.to_bytes();
-                    assert_eq!(got, want);
-                }
-                None => (),
+            if let Some(want) = check_points.get(&i) {
+                let got = &nonce.to_bytes();
+                assert_eq!(got, want);
             }
         }
     }
diff --git a/src/connection/secret_connection/public_key.rs b/src/connection/secret_connection/public_key.rs
index d689b17..def2cf3 100644
--- a/src/connection/secret_connection/public_key.rs
+++ b/src/connection/secret_connection/public_key.rs
@@ -1,5 +1,6 @@
 //! Secret Connection peer public keys
 
+use sha2::{digest::Digest, Sha256};
 use signatory::ed25519;
 use std::fmt::{self, Display};
 use tendermint::{
@@ -32,7 +33,13 @@ impl PublicKey {
     /// Get the remote Peer ID
     pub fn peer_id(self) -> node::Id {
         match self {
-            PublicKey::Ed25519(pk) => node::Id::from(pk),
+            PublicKey::Ed25519(pk) => {
+                // TODO(tarcieri): use `tendermint::node::Id::from`
+                let digest = Sha256::digest(pk.as_bytes());
+                let mut bytes = [0u8; 20];
+                bytes.copy_from_slice(&digest[..20]);
+                node::Id::new(bytes)
+            }
         }
     }
 }
diff --git a/src/connection/tcp.rs b/src/connection/tcp.rs
index 296c6ef..164a09a 100644
--- a/src/connection/tcp.rs
+++ b/src/connection/tcp.rs
@@ -5,7 +5,7 @@ use crate::{
     error::{Error, ErrorKind::*},
     prelude::*,
 };
-use signatory::{ed25519, PublicKeyed};
+use signatory::{ed25519, public_key::PublicKeyed};
 use signatory_dalek::Ed25519Signer;
 use std::{net::TcpStream, time::Duration};
 use subtle::ConstantTimeEq;
@@ -29,7 +29,7 @@ pub fn open_secret_connection(
     let connection = SecretConnection::new(socket, &public_key, &signer)?;
     let actual_peer_id = connection.remote_pubkey().peer_id();
 
-    // TODO(tarcieri): move this into `SecretConnection::new` in `tendermint-rs`?
+    // TODO(tarcieri): move this into `SecretConnection::new`
     if let Some(expected_peer_id) = peer_id {
         if expected_peer_id.ct_eq(&actual_peer_id).unwrap_u8() == 0 {
             fail!(
diff --git a/src/keyring/ed25519/ledgertm.rs b/src/keyring/ed25519/ledgertm.rs
index 7069555..0dc1bc4 100644
--- a/src/keyring/ed25519/ledgertm.rs
+++ b/src/keyring/ed25519/ledgertm.rs
@@ -6,7 +6,7 @@ use crate::{
     error::{Error, ErrorKind::*},
     keyring::{ed25519::Signer, SigningProvider},
 };
-use signatory::PublicKeyed;
+use signatory::public_key::PublicKeyed;
 use signatory_ledger_tm::Ed25519LedgerTmAppSigner;
 use tendermint::TendermintKey;
 
@@ -28,16 +28,20 @@ pub fn init(
     }
 
     let provider = Ed25519LedgerTmAppSigner::connect().map_err(|_| Error::from(SigningError))?;
+    let public_key = provider.public_key().map_err(|_| Error::from(InvalidKey))?;
 
-    // TODO(tarcieri): support for adding account keys into keyrings
-    let public_key = TendermintKey::ConsensusKey(
-        provider
-            .public_key()
-            .map_err(|_| Error::from(InvalidKey))?
+    // TODO(tarcieri): support for adding account keys into keyrings; signatory upgrade
+    let consensus_pubkey = TendermintKey::ConsensusKey(
+        tendermint::signatory::ed25519::PublicKey::from_bytes(public_key.as_bytes())
+            .unwrap()
             .into(),
     );
 
-    let signer = Signer::new(SigningProvider::LedgerTm, public_key, Box::new(provider));
+    let signer = Signer::new(
+        SigningProvider::LedgerTm,
+        consensus_pubkey,
+        Box::new(provider),
+    );
 
     for chain_id in &ledgertm_configs[0].chain_ids {
         chain_registry.add_to_keyring(chain_id, signer.clone())?;
diff --git a/src/keyring/ed25519/signer.rs b/src/keyring/ed25519/signer.rs
index 0109868..1ce1622 100644
--- a/src/keyring/ed25519/signer.rs
+++ b/src/keyring/ed25519/signer.rs
@@ -4,7 +4,7 @@ use crate::{
     error::{Error, ErrorKind::*},
     keyring::SigningProvider,
 };
-use signatory::ed25519::Signature;
+use signatory::{ed25519::Signature, signature};
 use std::sync::Arc;
 use tendermint::TendermintKey;
 
@@ -18,7 +18,7 @@ pub struct Signer {
     public_key: TendermintKey,
 
     /// Signer trait object
-    signer: Arc<Box<dyn signatory::Signer<Signature> + Send + Sync>>,
+    signer: Arc<Box<dyn signature::Signer<Signature> + Send + Sync>>,
 }
 
 impl Signer {
@@ -26,7 +26,7 @@ impl Signer {
     pub fn new(
         provider: SigningProvider,
         public_key: TendermintKey,
-        signer: Box<dyn signatory::Signer<Signature> + Send + Sync>,
+        signer: Box<dyn signature::Signer<Signature> + Send + Sync>,
     ) -> Self {
         Self {
             provider,
diff --git a/src/keyring/ed25519/softsign.rs b/src/keyring/ed25519/softsign.rs
index 1affe62..595eee7 100644
--- a/src/keyring/ed25519/softsign.rs
+++ b/src/keyring/ed25519/softsign.rs
@@ -9,7 +9,7 @@ use crate::{
     error::{Error, ErrorKind::*},
     keyring::{SecretKeyEncoding, SigningProvider},
 };
-use signatory::{ed25519, encoding::Decode, PublicKeyed};
+use signatory::{ed25519, encoding::Decode, public_key::PublicKeyed};
 use signatory_dalek::Ed25519Signer;
 use std::{fs, process};
 use tendermint::{config::PrivValidatorKey, PrivateKey, TendermintKey};
@@ -84,22 +84,29 @@ pub fn init(chain_registry: &mut chain::Registry, configs: &[SoftsignConfig]) ->
                 .priv_key;
 
             match private_key {
-                PrivateKey::Ed25519(pk) => pk.to_seed(),
+                PrivateKey::Ed25519(pk) => {
+                    // TODO(tarcieri): upgrade Signatory version
+                    ed25519::Seed::from_bytes(pk.to_seed().as_secret_slice()).unwrap()
+                }
             }
         }
     };
 
     let provider = Ed25519Signer::from(&seed);
+    let public_key = provider.public_key().map_err(|_| Error::from(InvalidKey))?;
 
-    // TODO(tarcieri): support for adding account keys into keyrings
-    let public_key = TendermintKey::ConsensusKey(
-        provider
-            .public_key()
-            .map_err(|_| Error::from(InvalidKey))?
+    // TODO(tarcieri): support for adding account keys into keyrings; upgrade Signatory version
+    let consensus_pubkey = TendermintKey::ConsensusKey(
+        tendermint::signatory::ed25519::PublicKey::from_bytes(public_key.as_bytes())
+            .unwrap()
             .into(),
     );
 
-    let signer = Signer::new(SigningProvider::SoftSign, public_key, Box::new(provider));
+    let signer = Signer::new(
+        SigningProvider::SoftSign,
+        consensus_pubkey,
+        Box::new(provider),
+    );
 
     for chain_id in &config.chain_ids {
         chain_registry.add_to_keyring(chain_id, signer.clone())?;
diff --git a/src/keyring/ed25519/yubihsm.rs b/src/keyring/ed25519/yubihsm.rs
index 90edff7..fb71a6a 100644
--- a/src/keyring/ed25519/yubihsm.rs
+++ b/src/keyring/ed25519/yubihsm.rs
@@ -6,7 +6,7 @@ use crate::{
     error::{Error, ErrorKind::*},
     keyring::{ed25519::Signer, SigningProvider},
 };
-use signatory::PublicKeyed;
+use signatory::public_key::PublicKeyed;
 use tendermint::TendermintKey;
 
 /// Create hardware-backed YubiHSM signer objects from the given configuration
@@ -37,20 +37,21 @@ pub fn init(
                 )
             })?;
 
-        // TODO(tarcieri): support for adding account keys into keyrings
-        let public_key = TendermintKey::ConsensusKey(
-            signer
-                .public_key()
-                .map_err(|_| {
-                    err!(
-                        InvalidKey,
-                        "couldn't get public key for YubiHSM key ID 0x{:04x}"
-                    )
-                })?
+        let public_key = signer.public_key().map_err(|_| {
+            err!(
+                InvalidKey,
+                "couldn't get public key for YubiHSM key ID 0x{:04x}"
+            )
+        })?;
+
+        // TODO(tarcieri): support for adding account keys into keyrings; signatory upgrade
+        let consensus_pubkey = TendermintKey::ConsensusKey(
+            tendermint::signatory::ed25519::PublicKey::from_bytes(public_key.as_bytes())
+                .unwrap()
                 .into(),
         );
 
-        let signer = Signer::new(SigningProvider::Yubihsm, public_key, Box::new(signer));
+        let signer = Signer::new(SigningProvider::Yubihsm, consensus_pubkey, Box::new(signer));
 
         for chain_id in &config.chain_ids {
             chain_registry.add_to_keyring(chain_id, signer.clone())?;
diff --git a/src/session.rs b/src/session.rs
index c1ea363..e02e31f 100644
--- a/src/session.rs
+++ b/src/session.rs
@@ -164,7 +164,11 @@ impl Session {
         let signature = chain.keyring.sign_ed25519(None, &to_sign)?;
 
         self.log_signing_request(&request, started_at).unwrap();
-        request.set_signature(&signature);
+
+        // TODO(tarcieri): bump Signatory version in the `tendermint` crate
+        request.set_signature(&tendermint::signatory::ed25519::Signature::new(
+            signature.to_bytes(),
+        ));
 
         Ok(request.build_response(None))
     }
diff --git a/tests/integration.rs b/tests/integration.rs
index 1a2399d..b654b4d 100644
--- a/tests/integration.rs
+++ b/tests/integration.rs
@@ -5,7 +5,12 @@ extern crate prost_amino as prost;
 use crate::prost::Message;
 use chrono::{DateTime, Utc};
 use rand::Rng;
-use signatory::{ed25519, Decode, PublicKeyed, Signature, Verifier};
+use signatory::{
+    ed25519,
+    encoding::Decode,
+    public_key::PublicKeyed,
+    signature::{Signature, Verifier},
+};
 use signatory_dalek::{Ed25519Signer, Ed25519Verifier};
 use std::{
     fs,