diff --git a/Cargo.toml b/Cargo.toml
index 44446d2d74960bf48d065800f269a5818bbe9304..89606ac84783c7b2a97ceada70575abb821dcb80 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,4 +9,5 @@ keywords = ["unsafe", "va_list", "ffi", "c"]
 license = "MIT"
 
 [dev-dependencies.va_list-helper]
+version = "*"
 path = "deps/helper/"