diff --git a/Cargo.toml b/Cargo.toml
index 87542bf0..4ac16d6a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -18,14 +18,14 @@ bytes = "0.4"
 failure = "0.1"
 failure_derive = "0.1"
 fnv = "1"
-futures = "0.1"
+futures = "^0.1.18"
 mio = "0.6"
 mysql_common = "0.15"
 native-tls = { version = "0.2", optional = true }
 regex = "1"
 serde = "1"
 serde_json = "1"
-tokio = "0.1"
+tokio = "^0.1.9"
 tokio-codec = "0.1"
 tokio-io = "0.1"
 twox-hash = "1"