diff --git a/Cargo.toml b/Cargo.toml
index 74bab12..606ab97 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -33,4 +33,4 @@ default-features = false
 features = []
 
 [dev-dependencies.serial_test]
-version = "^2.0"
+version = "^3.1"