diff --git a/Cargo.toml b/Cargo.toml
index 8938783..fbd1541 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -39,6 +39,7 @@ serde = "1.0"
 serde_derive = "1.0"
 serde_json = { version = "1.0", optional = true }
 serde_yaml = { version = "0.7", optional = true }
+tokio = "0.1"
 tokio-core = "0.1"
 tokio-io = "0.1"
 tokio-mockstream = "1.1"
diff --git a/src/lib.rs b/src/lib.rs
index 27c66f0..2fdd974 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -59,6 +59,7 @@ extern crate serde_derive;
 extern crate serde_json;
 #[cfg(feature = "yaml")]
 extern crate serde_yaml;
+extern crate tokio;
 extern crate tokio_core;
 extern crate tokio_io;
 extern crate tokio_mockstream;