diff --git a/Cargo.toml b/Cargo.toml
index b193e77..3f65e90 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -29,5 +29,5 @@ hmac = "0.12"
 sha2 = "0.10"
 base64 = "0.13"
 stringprep = "0.1"
-tokio-rustls = "*"
-rustls-pemfile = "*"
+tokio-rustls = "0.23"
+rustls-pemfile = "1"