diff --git a/Cargo.toml b/Cargo.toml
index 4dbad62..a70b1e3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,5 +4,5 @@ version = "0.1.0"
 authors = ["Parity Technologies <admin@parity.io>"]
 
 [dependencies]
-parking_lot = "0.5"
+parking_lot = "0.6"
 kvdb = { path = "../kvdb" }