diff --git a/Cargo.lock b/Cargo.lock
index 3f45c515b..ff6e13bbd 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -151,9 +151,9 @@ dependencies = [
 
 [[package]]
 name = "base64"
-version = "0.21.5"
+version = "0.22.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "35636a1494ede3b646cc98f74f8e62c773a38a659ebc777a2cf26b9b74171df9"
+checksum = "9475866fec1451be56a3c2400fd081ff546538961565ccb5b7142cbd22bc7a51"
 
 [[package]]
 name = "base64ct"
diff --git a/base64ct/Cargo.toml b/base64ct/Cargo.toml
index dbb4ef0c5..c59f416be 100644
--- a/base64ct/Cargo.toml
+++ b/base64ct/Cargo.toml
@@ -17,7 +17,7 @@ edition = "2021"
 rust-version = "1.60"
 
 [dev-dependencies]
-base64 = "0.21"
+base64 = "0.22"
 # pinned to preserve MSRV
 proptest = { version = "=1.2.0", default-features = false, features = ["std"] }