diff --git a/Cargo.toml b/Cargo.toml
index 80a91be..32ad947 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -24,7 +24,7 @@ ring = "0.13"
 rand = "0.7"
 
 [dev-dependencies]
-quickcheck = "0.9"
+quickcheck = "1.0"
 speculate = "0.1"
 parking_lot = { version = "0.11", features = ["nightly"] }