diff --git a/Cargo.toml b/Cargo.toml
index c7188d5..f789bc5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -21,14 +21,14 @@ headers = "0.3.1"
 tokio = "1.0"
 httpmock = { version = "0.6.2", optional = true }
 rustls = { version = "0.20.2" }
-base64 = { version = "0.13.0", optional = true }
+base64 = { version = "0.21.0", optional = true }
 thiserror = "1.0.30"
 rsa = "0.5.0"
 rand = "0.8.5"
 
 [dev-dependencies]
 httpmock = { version = "0.6.2" }
-base64 = { version = "0.13.0" }
+base64 = { version = "0.21.0" }
 
 [features]
 test-helper = ["httpmock", "base64"]