diff --git a/Cargo.toml b/Cargo.toml
index 3d72f41c2..ff8571ba6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -110,8 +110,8 @@ openssl = { version="0.10", optional = true }
 tokio-openssl = { version="0.2", optional = true }
 
 #rustls
-rustls = { version = "0.13", optional = true }
-tokio-rustls = { version = "0.7", optional = true }
+rustls = { version = "^0.13.1", optional = true }
+tokio-rustls = { version = "^0.7.2", optional = true }
 webpki = { version = "0.18", optional = true }
 webpki-roots = { version = "0.15", optional = true }