diff --git a/Cargo.toml b/Cargo.toml
index b6b6511..8f7edb6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,7 +10,7 @@ lto = true
 codegen-units = 1
 
 [dependencies]
-tokio = "0.1.18"
+tokio = "0.3.3"
 tokio-codec = "0.1.1"
 bytes = "0.4.12"
 futures = "0.1.26"