diff --git a/Cargo.toml b/Cargo.toml
index 90f36cc..8ddc183 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -21,7 +21,7 @@ futures = "0.1.27"
 hyper = "0.12.29"
 jemallocator = "0"
 native-tls = { version = "0.2.3", optional = true }
-tokio = "0.1.20"
+tokio = "0.1.21"
 tokio-current-thread = "0.1.6"
 tokio-timer = "0.2.11"
 tokio-tls = { version = "0.2.1", optional = true }