diff --git a/Cargo.toml b/Cargo.toml
index 08bbecd..8b4defe 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,7 +16,7 @@ simd_asm = ["simd_opt"]
 
 [dependencies]
 constant_time_eq = "0.1.0"
-clippy = {version = "*", optional = true}
+clippy = {version = "0.0.37", optional = true}
 
 [dev-dependencies]
 data-encoding = "1.1.0"