diff --git a/Cargo.lock b/Cargo.lock
index 9c4cd95c..93334976 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -325,6 +325,12 @@ version = "0.22.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "72b3254f16251a8381aa12e40e3c4d2f0199f8c6508fbecb9d91f575e0fbb8c6"
 
+[[package]]
+name = "base64"
+version = "0.23.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b25655df2c3cdd83c5e5b293b88acd880332b2ddadd7c30ac43144fdc0033da9"
+
 [[package]]
 name = "base64-url"
 version = "3.0.2"
@@ -2195,7 +2201,7 @@ dependencies = [
  "anyhow",
  "async-trait",
  "axum",
- "base64 0.22.1",
+ "base64 0.23.0",
  "base64-url",
  "chrono",
  "dirs",
@@ -2274,7 +2280,7 @@ dependencies = [
  "arbitrary",
  "assert_matches",
  "async-trait",
- "base64 0.22.1",
+ "base64 0.23.0",
  "chrono",
  "clap",
  "fastrand",
@@ -2467,7 +2473,7 @@ dependencies = [
  "assert_matches",
  "async-trait",
  "axum",
- "base64 0.22.1",
+ "base64 0.23.0",
  "chrono",
  "dirs",
  "futures",
diff --git a/Cargo.toml b/Cargo.toml
index 9d85c69e..63064d7b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -63,7 +63,7 @@ dirs = "5.0"
 
 # Crypto
 sha2 = "0.10"
-base64 = "0.22"
+base64 = "0.23"
 rand = "0.8"
 
 # Keyring
diff --git a/mcp-external-validation/Cargo.toml b/mcp-external-validation/Cargo.toml
index f7f34bad..1a6cd916 100644
--- a/mcp-external-validation/Cargo.toml
+++ b/mcp-external-validation/Cargo.toml
@@ -65,7 +65,7 @@ serde_yaml = { workspace = true }
 # Fuzzing dependencies
 arbitrary = { version = "1.3", features = ["derive"], optional = true }
 fastrand = { version = "2.0", optional = true }
-base64 = "0.22"
+base64 = "0.23"
 tempfile = "3.0"
 which = "6.0"
 shellexpand = "3.1"