diff --git a/rust/Cargo.lock b/rust/Cargo.lock
index 7b33345ce..fd808eec5 100644
--- a/rust/Cargo.lock
+++ b/rust/Cargo.lock
@@ -316,9 +316,9 @@ checksum = "9e1b586273c5702936fe7b7d6896644d8be71e6314cfe09d3167c95f712589e8"
 
 [[package]]
 name = "base64"
-version = "0.21.4"
+version = "0.21.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9ba43ea6f343b788c8764558649e08df62f86c6ef251fdaeb1ffd010a9ae50a2"
+checksum = "35636a1494ede3b646cc98f74f8e62c773a38a659ebc777a2cf26b9b74171df9"
 
 [[package]]
 name = "base64ct"
@@ -722,7 +722,7 @@ dependencies = [
 name = "connlib-shared"
 version = "1.20231001.0"
 dependencies = [
- "base64 0.21.4",
+ "base64 0.21.5",
  "boringtun",
  "chrono",
  "futures",
@@ -1176,7 +1176,7 @@ version = "1.20231001.0"
 dependencies = [
  "anyhow",
  "axum",
- "base64 0.21.4",
+ "base64 0.21.5",
  "bytecodec",
  "bytes",
  "clap",
@@ -2446,7 +2446,7 @@ version = "3.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3163d2912b7c3b52d651a055f2c7eec9ba5cd22d26ef75b8dd3a59980b185923"
 dependencies = [
- "base64 0.21.4",
+ "base64 0.21.5",
  "serde",
 ]
 
@@ -2469,7 +2469,7 @@ checksum = "9b2a4787296e9989611394c33f193f676704af1686e70b8f8033ab5ba9a35a94"
 name = "phoenix-channel"
 version = "1.20231001.0"
 dependencies = [
- "base64 0.21.4",
+ "base64 0.21.5",
  "futures",
  "rand_core",
  "secrecy",
@@ -2828,7 +2828,7 @@ version = "0.11.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "046cd98826c46c2ac8ddecae268eb5c2e58628688a5fc7a2643704a73faba95b"
 dependencies = [
- "base64 0.21.4",
+ "base64 0.21.5",
  "bytes",
  "encoding_rs",
  "futures-core",
@@ -3026,7 +3026,7 @@ version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2d3987094b1d07b653b7dfdc3f70ce9a1da9c51ac18c1b06b662e4f9a0e9f4b2"
 dependencies = [
- "base64 0.21.4",
+ "base64 0.21.5",
 ]
 
 [[package]]
@@ -3377,7 +3377,7 @@ name = "stun"
 version = "0.5.0"
 source = "git+https://github.com/firezone/webrtc?branch=master#f4c503333ac8ee01d0ad4e8ba827baa9f83f3fe2"
 dependencies = [
- "base64 0.21.4",
+ "base64 0.21.5",
  "crc",
  "lazy_static",
  "md-5",
@@ -3733,7 +3733,7 @@ checksum = "3082666a3a6433f7f511c7192923fa1fe07c69332d3c6a2e6bb040b569199d5a"
 dependencies = [
  "async-trait",
  "axum",
- "base64 0.21.4",
+ "base64 0.21.5",
  "bytes",
  "futures-core",
  "futures-util",
@@ -4006,7 +4006,7 @@ version = "0.7.0"
 source = "git+https://github.com/firezone/webrtc?branch=master#f4c503333ac8ee01d0ad4e8ba827baa9f83f3fe2"
 dependencies = [
  "async-trait",
- "base64 0.21.4",
+ "base64 0.21.5",
  "futures",
  "log",
  "md-5",
diff --git a/rust/phoenix-channel/Cargo.toml b/rust/phoenix-channel/Cargo.toml
index 9f87b8eb3..b92e9fdb2 100644
--- a/rust/phoenix-channel/Cargo.toml
+++ b/rust/phoenix-channel/Cargo.toml
@@ -10,7 +10,7 @@ edition = "2021"
 secrecy = { workspace = true }
 tokio-tungstenite = { version = "0.20.1", features = ["rustls-tls-native-roots"] }
 futures = "0.3.29"
-base64 = "0.21.4"
+base64 = "0.21.5"
 serde = { version = "1.0.190", features = ["derive"] }
 tracing = { workspace = true }
 rand_core = "0.6.4"
diff --git a/rust/relay/Cargo.toml b/rust/relay/Cargo.toml
index 7f00474a3..03d3794ad 100644
--- a/rust/relay/Cargo.toml
+++ b/rust/relay/Cargo.toml
@@ -26,7 +26,7 @@ env_logger = "0.10.0"
 tracing-core = "0.1.31"
 bytes = "1.4.0"
 sha2 = "0.10.8"
-base64 = "0.21.4"
+base64 = "0.21.5"
 once_cell = "1.17.1"
 proptest = { version = "1.3.1", optional = true }
 test-strategy = "0.3.1"