diff --git a/Cargo.toml b/Cargo.toml
index b40a6bd..5b9d8fd 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -30,7 +30,7 @@ clap       = { version = "2.33", optional = true }
 futures    = { version = "0.1", optional = true }
 tokio-core = { version = "0.1", optional = true }
 hyper      = { version = "0.11", optional = true }
-hyper-tls  = { version = "0.1", optional = true }
+hyper-tls  = { version = "0.4", optional = true }
 
 smoltcp = { version = "0.5", optional = true, default-features = false, features = [ "std", "log", "proto-ipv4", "proto-ipv6" ] }