diff --git a/lib/Cargo.toml b/lib/Cargo.toml
index f9cafa1..cf007d9 100644
--- a/lib/Cargo.toml
+++ b/lib/Cargo.toml
@@ -20,7 +20,7 @@ path = "src/lib.rs"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-base64 = "0.13"
+base64 = "0.21"
 http-auth-basic = "0.3"
 hyper = { version = "0.14", features = ["http2"] }
 hyper-tls = { version = "0.5", optional = true }