diff --git a/Cargo.toml b/Cargo.toml
index 52316d5..2fa8412 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -23,7 +23,7 @@ directories = "6.0.0"
 # RustCrypto dependencies (optional)
 p256 = { version = "0.13", features = ["ecdsa"], optional = true }
 p384 = { version = "0.13", features = ["ecdsa"], optional = true }
-sha2 = { version = "0.10", optional = true }
+sha2 = { version = "0.11", optional = true }
 
 # OpenSSL dependencies (optional)
 openssl = { version = "0.10", optional = true }