diff --git a/Cargo.toml b/Cargo.toml
index 541d072..02e466e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -35,10 +35,10 @@ tokio-timer = "0.2.6" # a minimum version so trust-dns-resolver compiles
 trust-dns-resolver = { version = "0.10", optional = true }
 url = "1.2"
 uuid = { version = "0.7", features = ["v4"] }
-hyper-rustls = { version = "0.15.1", optional = true }
-tokio-rustls = { version = "0.8", optional = true }
-webpki-roots = { version = "0.15", optional = true }
-rustls = { version = "0.14", features = ["dangerous_configuration"], optional = true }
+hyper-rustls = { version = "0.16", optional = true }
+tokio-rustls = { version = "0.9", optional = true }
+webpki-roots = { version = "0.16", optional = true }
+rustls = { version = "0.15", features = ["dangerous_configuration"], optional = true }
 
 [dev-dependencies]
 env_logger = "0.6"