diff --git a/Cargo.lock b/Cargo.lock
index fefe8fd1f7..62a5123149 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -342,6 +342,12 @@ version = "0.21.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9d297deb1925b89f2ccc13d7635fa0714f12c87adce1c75356b39ca9b7178567"
 
+[[package]]
+name = "base64"
+version = "0.22.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9475866fec1451be56a3c2400fd081ff546538961565ccb5b7142cbd22bc7a51"
+
 [[package]]
 name = "base64ct"
 version = "1.6.0"
@@ -2312,7 +2318,7 @@ name = "oak_attestation_verification"
 version = "0.1.0"
 dependencies = [
  "anyhow",
- "base64 0.21.7",
+ "base64 0.22.0",
  "coset",
  "ecdsa",
  "getrandom",
diff --git a/oak_attestation_verification/Cargo.toml b/oak_attestation_verification/Cargo.toml
index 1bc424248c..1de861f6a9 100644
--- a/oak_attestation_verification/Cargo.toml
+++ b/oak_attestation_verification/Cargo.toml
@@ -11,7 +11,7 @@ std = ["time/formatting"]
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 [dependencies]
 anyhow = { version = "*", default-features = false }
-base64 = { version = "0.21", default-features = false, features = ["alloc"] }
+base64 = { version = "0.22", default-features = false, features = ["alloc"] }
 coset = { version = "*", default-features = false }
 ecdsa = { version = "*", default-features = false, features = ["pkcs8", "pem"] }
 getrandom = { version = "*", default-features = false, features = [