diff --git a/Cargo.toml b/Cargo.toml
index 16b2bee..5fbcff1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -29,7 +29,7 @@ optional = true
 version = "1.0"
 optional = true
 [dev-dependencies.quickcheck]
-version = "0.5"
+version = "1"
 
 [features]
 default = []
