diff --git a/Cargo.toml b/Cargo.toml
index b40a6bd..25d7f96 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -32,7 +32,7 @@ tokio-core = { version = "0.1", optional = true }
 hyper      = { version = "0.11", optional = true }
 hyper-tls  = { version = "0.1", optional = true }
 
-smoltcp = { version = "0.5", optional = true, default-features = false, features = [ "std", "log", "proto-ipv4", "proto-ipv6" ] }
+smoltcp = { version = "0.7", optional = true, default-features = false, features = [ "std", "log", "proto-ipv4", "proto-ipv6" ] }
 
 [dev-dependencies]