diff --git a/Cargo.toml b/Cargo.toml
index 30c415b..755dbe1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -18,7 +18,7 @@ clap = {version = "3.0.0-beta.1", optional = true, default-features = false, fea
 
 [dev-dependencies]
 criterion = "0.3"
-quickcheck = {version = "0.9", default-features = false}
+quickcheck = {version = "1.0", default-features = false}
 quickcheck_macros = "0.9"
 sudoku = { version = "0.7", features = ["unchecked_indexing"]}
 rand = "0.7"