diff --git a/Cargo.toml b/Cargo.toml
index ce29dcb..b29ecf2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -26,7 +26,7 @@ serde_json = { version = "^1.0" }
 
 # Optional dependencies
 openssl = { version = "0.10", optional = true }
-rustls = { version = "0.23.19", optional = true, default-features = false }
+rustls = { version = "0.23.21", optional = true, default-features = false }
 webpki-roots = { version = "0.25", optional = true }
 
 byteorder = { version = "1.0", optional = true }