diff --git a/rust/Cargo.lock b/rust/Cargo.lock
index e1d56aac3..5da7b4ddf 100644
--- a/rust/Cargo.lock
+++ b/rust/Cargo.lock
@@ -415,9 +415,9 @@ checksum = "9e1b586273c5702936fe7b7d6896644d8be71e6314cfe09d3167c95f712589e8"
 
 [[package]]
 name = "base64"
-version = "0.21.2"
+version = "0.21.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "604178f6c5c21f02dc555784810edfb88d34ac2c73b2eae109655649ee73ce3d"
+checksum = "414dcefbc63d77c526a76b3afcf6fbb9b5e2791c19c3aa2297733208750c6e53"
 
 [[package]]
 name = "base64ct"
@@ -1810,7 +1810,7 @@ dependencies = [
  "android_logger",
  "async-trait",
  "backoff",
- "base64 0.21.2",
+ "base64 0.21.3",
  "boringtun",
  "chrono",
  "futures",
@@ -2269,7 +2269,7 @@ checksum = "9b2a4787296e9989611394c33f193f676704af1686e70b8f8033ab5ba9a35a94"
 name = "phoenix-channel"
 version = "0.1.0"
 dependencies = [
- "base64 0.21.2",
+ "base64 0.21.3",
  "futures",
  "rand_core",
  "serde",
@@ -2597,7 +2597,7 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "axum",
- "base64 0.21.2",
+ "base64 0.21.3",
  "bytecodec",
  "bytes",
  "clap",
@@ -2793,7 +2793,7 @@ version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2d3987094b1d07b653b7dfdc3f70ce9a1da9c51ac18c1b06b662e4f9a0e9f4b2"
 dependencies = [
- "base64 0.21.2",
+ "base64 0.21.3",
 ]
 
 [[package]]
@@ -3137,7 +3137,7 @@ name = "stun"
 version = "0.4.4"
 source = "git+https://github.com/firezone/webrtc?rev=672e728#672e728b2386e17d80c210a8be6ec364916ffb17"
 dependencies = [
- "base64 0.21.2",
+ "base64 0.21.3",
  "crc",
  "lazy_static",
  "md-5",
@@ -3648,7 +3648,7 @@ version = "0.6.1"
 source = "git+https://github.com/firezone/webrtc?rev=672e728#672e728b2386e17d80c210a8be6ec364916ffb17"
 dependencies = [
  "async-trait",
- "base64 0.21.2",
+ "base64 0.21.3",
  "futures",
  "log",
  "md-5",
diff --git a/rust/phoenix-channel/Cargo.toml b/rust/phoenix-channel/Cargo.toml
index 8bbae7333..ce69a5af5 100644
--- a/rust/phoenix-channel/Cargo.toml
+++ b/rust/phoenix-channel/Cargo.toml
@@ -8,7 +8,7 @@ edition = "2021"
 [dependencies]
 tokio-tungstenite = { version = "0.19.0", features = ["rustls-tls-native-roots"] }
 futures = "0.3.28"
-base64 = "0.21.2"
+base64 = "0.21.3"
 serde = { version = "1.0.183", features = ["derive"] }
 tracing = "0.1.37"
 rand_core = "0.6.4"
diff --git a/rust/relay/Cargo.toml b/rust/relay/Cargo.toml
index b8fe036f8..7fb65186e 100644
--- a/rust/relay/Cargo.toml
+++ b/rust/relay/Cargo.toml
@@ -19,7 +19,7 @@ tracing-stackdriver = "0.7.2"
 env_logger = "0.10.0"
 bytes = "1.4.0"
 sha2 = "0.10.6"
-base64 = "0.21.0"
+base64 = "0.21.3"
 once_cell = "1.17.1"
 proptest = { version = "1.2.0", optional = true }
 test-strategy = "0.3.1"