diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index 45dd7de14..115a4d35d 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 8.1.0-alpha.0
+current_version = 9.0.0-alpha.0
 tag = True
 sign_tags = True
 tag_message = EVMC {new_version}
diff --git a/CMakeLists.txt b/CMakeLists.txt
index d7cbe4612..6b7517494 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -44,7 +44,7 @@ endif()
 cable_set_build_type(DEFAULT Release CONFIGURATION_TYPES Debug Release)
 
 project(evmc)
-set(PROJECT_VERSION 8.1.0-alpha.0)
+set(PROJECT_VERSION 9.0.0-alpha.0)
 
 include(GNUInstallDirs)  # Must be included after any language is enabled.
 if(NOT DEFINED CMAKE_RUNTIME_OUTPUT_DIRECTORY)
diff --git a/bindings/rust/evmc-declare-tests/Cargo.toml b/bindings/rust/evmc-declare-tests/Cargo.toml
index e182b2ae1..01a4f27c8 100644
--- a/bindings/rust/evmc-declare-tests/Cargo.toml
+++ b/bindings/rust/evmc-declare-tests/Cargo.toml
@@ -4,7 +4,7 @@
 
 [package]
 name = "evmc-declare-tests"
-version = "8.1.0-alpha.0"
+version = "9.0.0-alpha.0"
 authors = ["Jake Lang <jak3lang@gmail.com>"]
 license = "Apache-2.0"
 repository = "https://github.com/ethereum/evmc"
diff --git a/bindings/rust/evmc-declare/Cargo.toml b/bindings/rust/evmc-declare/Cargo.toml
index 69f2484f6..0680106c9 100644
--- a/bindings/rust/evmc-declare/Cargo.toml
+++ b/bindings/rust/evmc-declare/Cargo.toml
@@ -4,7 +4,7 @@
 
 [package]
 name = "evmc-declare"
-version = "8.1.0-alpha.0"
+version = "9.0.0-alpha.0"
 authors = ["Jake Lang <jak3lang@gmail.com>", "Alex Beregszaszi <alex@rtfs.hu>"]
 license = "Apache-2.0"
 repository = "https://github.com/ethereum/evmc"
@@ -17,7 +17,7 @@ heck = "0.3.1"
 proc-macro2 = "1.0"
 syn = { version = "1.0", features = ["full"] }
 # For documentation examples
-evmc-vm = { path = "../evmc-vm", version = "8.1.0-alpha.0" }
+evmc-vm = { path = "../evmc-vm", version = "9.0.0-alpha.0" }
 
 [lib]
 proc-macro = true
diff --git a/bindings/rust/evmc-sys/Cargo.toml b/bindings/rust/evmc-sys/Cargo.toml
index 6c18866d0..b72ec9310 100644
--- a/bindings/rust/evmc-sys/Cargo.toml
+++ b/bindings/rust/evmc-sys/Cargo.toml
@@ -4,7 +4,7 @@
 
 [package]
 name = "evmc-sys"
-version = "8.1.0-alpha.0"
+version = "9.0.0-alpha.0"
 authors = ["Alex Beregszaszi <alex@rtfs.hu>"]
 license = "Apache-2.0"
 repository = "https://github.com/ethereum/evmc"
diff --git a/bindings/rust/evmc-vm/Cargo.toml b/bindings/rust/evmc-vm/Cargo.toml
index 802dcb9e5..fec01718b 100644
--- a/bindings/rust/evmc-vm/Cargo.toml
+++ b/bindings/rust/evmc-vm/Cargo.toml
@@ -4,7 +4,7 @@
 
 [package]
 name = "evmc-vm"
-version = "8.1.0-alpha.0"
+version = "9.0.0-alpha.0"
 authors = ["Alex Beregszaszi <alex@rtfs.hu>", "Jake Lang <jak3lang@gmail.com>"]
 license = "Apache-2.0"
 repository = "https://github.com/ethereum/evmc"
@@ -12,4 +12,4 @@ description = "Bindings to EVMC (VM specific)"
 edition = "2018"
 
 [dependencies]
-evmc-sys = { path = "../evmc-sys", version = "8.1.0-alpha.0" }
+evmc-sys = { path = "../evmc-sys", version = "9.0.0-alpha.0" }
diff --git a/docs/EVMC.md b/docs/EVMC.md
index 50480235a..7f561c8c5 100644
--- a/docs/EVMC.md
+++ b/docs/EVMC.md
@@ -1,6 +1,6 @@
 # EVMC – Ethereum Client-VM Connector API {#mainpage}
 
-**ABI version 8**
+**ABI version 9**
 
 The EVMC is the low-level ABI between Ethereum Virtual Machines (EVMs) and
 Ethereum Clients. On the EVM-side it supports classic EVM1 and [ewasm].
diff --git a/examples/example-rust-vm/Cargo.toml b/examples/example-rust-vm/Cargo.toml
index 42b7ba6ab..9e8f02424 100644
--- a/examples/example-rust-vm/Cargo.toml
+++ b/examples/example-rust-vm/Cargo.toml
@@ -4,7 +4,7 @@
 
 [package]
 name = "example-rust-vm"
-version = "8.1.0-alpha.0"
+version = "9.0.0-alpha.0"
 authors = ["Alex Beregszaszi <alex@rtfs.hu>", "Jake Lang <jak3lang@gmail.com>"]
 edition = "2018"
 publish = false
diff --git a/examples/example-rust-vm/src/lib.rs b/examples/example-rust-vm/src/lib.rs
index 6027a37d5..6d7d28c20 100644
--- a/examples/example-rust-vm/src/lib.rs
+++ b/examples/example-rust-vm/src/lib.rs
@@ -6,7 +6,7 @@
 use evmc_declare::evmc_declare_vm;
 use evmc_vm::*;
 
-#[evmc_declare_vm("ExampleRustVM", "evm, precompiles", "8.1.0-alpha.0")]
+#[evmc_declare_vm("ExampleRustVM", "evm, precompiles", "9.0.0-alpha.0")]
 pub struct ExampleRustVM;
 
 impl EvmcVm for ExampleRustVM {
diff --git a/go.mod b/go.mod
index 68e70ecef..5b677fe27 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,3 @@
-module github.com/ethereum/evmc/v8
+module github.com/ethereum/evmc/v9
 
 go 1.11
diff --git a/include/evmc/evmc.h b/include/evmc/evmc.h
index 971c7c4b6..6f6ff013d 100644
--- a/include/evmc/evmc.h
+++ b/include/evmc/evmc.h
@@ -44,7 +44,7 @@ enum
      *
      * @see @ref versioning
      */
-    EVMC_ABI_VERSION = 8
+    EVMC_ABI_VERSION = 9
 };
 
 
diff --git a/test/gomod/README b/test/gomod/README
index bf8b463a6..177232f0e 100644
--- a/test/gomod/README
+++ b/test/gomod/README
@@ -3,7 +3,7 @@ Integration test for EVMC Go module
 Usage:
 
     go mod init evmc.ethereum.org/evmc_use
-    go get github.com/ethereum/evmc/v8@<commit-hash-to-be-tested>
+    go get github.com/ethereum/evmc/v9@<commit-hash-to-be-tested>
     go mod tidy
     gcc -shared -I../../include ../../examples/example_vm/example_vm.cpp -o example-vm.so
     go test
diff --git a/test/gomod/use_evmc_test.go b/test/gomod/use_evmc_test.go
index 6e59a6da4..f712acb9f 100644
--- a/test/gomod/use_evmc_test.go
+++ b/test/gomod/use_evmc_test.go
@@ -1,7 +1,7 @@
 package evmc_use
 
 import (
-	"github.com/ethereum/evmc/v8/bindings/go/evmc"
+	"github.com/ethereum/evmc/v9/bindings/go/evmc"
 	"testing"
 )