diff --git a/Cargo.toml b/Cargo.toml
index e14a40e8..116c61ef 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -19,6 +19,8 @@ serde = "1.0"
 serde_json = "1.0"
 serde_derive = "1.0"
 sha2 = "0.7"
-tokio = "0.1"
 tokio-io = "0.1"
 url = "1.0"
+
+[dev-dependencies]
+tokio = "0.1"