diff --git a/Cargo.toml b/Cargo.toml
index 0f3f4baa..c7d4f903 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -29,4 +29,4 @@ vm-memory = "0.6"
 [dev-dependencies]
 tempfile = ">=3.2.0"
 vm-memory = { version = "0.6", features=["backend-mmap"] }
-serial_test = "*"
+serial_test = "0.5"