diff --git a/gremlin-client/Cargo.toml b/gremlin-client/Cargo.toml
index eda2c516..71c1ac70 100644
--- a/gremlin-client/Cargo.toml
+++ b/gremlin-client/Cargo.toml
@@ -51,7 +51,7 @@ async-tls =  { version = "0.12", optional = true }
 tokio-native-tls = { version = "0.3.0", optional = true }
 tokio-stream = { version = "0.1.2", optional = true }
 gremlin-derive = { path="../gremlin-derive", version="0.1", optional=true }
-rustls =   { version="0.20", features = ["dangerous_configuration"], optional = true}
+rustls =   { version="0.21", features = ["dangerous_configuration"], optional = true}
 webpki = { version = "0.22.2", optional = true }
 thiserror = "1.0.20"