diff --git a/core/Cargo.toml b/core/Cargo.toml
index b6a45248..d2989c63 100644
--- a/core/Cargo.toml
+++ b/core/Cargo.toml
@@ -44,7 +44,7 @@ ring = { version = "0.16.9", features = ["alloc", "std"], default-features = fal
 
 [dev-dependencies]
 async-std = { version = "1.6.2", features = ["attributes"] }
-base64 = "0.13.0"
+base64 = "0.21.0"
 criterion = "0.3"
 libp2p-mplex = { path = "../muxers/mplex" }
 libp2p-noise = { path = "../transports/noise" }
diff --git a/misc/keygen/Cargo.toml b/misc/keygen/Cargo.toml
index 434845b5..621251de 100644
--- a/misc/keygen/Cargo.toml
+++ b/misc/keygen/Cargo.toml
@@ -14,4 +14,4 @@ zeroize = "1"
 serde = { version = "1.0.136", features = ["derive"] }
 serde_json = "1.0.79"
 libp2p-core = { path = "../../core", default-features = false, version = "0.33.0"}
-base64 = "0.13.0"
+base64 = "0.21.0"
diff --git a/protocols/gossipsub/Cargo.toml b/protocols/gossipsub/Cargo.toml
index 73f6f418..0e2ff08d 100644
--- a/protocols/gossipsub/Cargo.toml
+++ b/protocols/gossipsub/Cargo.toml
@@ -22,7 +22,7 @@ asynchronous-codec = "0.6"
 unsigned-varint = { version = "0.7.0", features = ["asynchronous_codec"] }
 log = "0.4.11"
 sha2 = "0.10.0"
-base64 = "0.13.0"
+base64 = "0.21.0"
 smallvec = "1.6.1"
 prost = "0.10"
 hex_fmt = "0.3.0"