diff --git a/composer.json b/composer.json
index f6f4066..f866394 100644
--- a/composer.json
+++ b/composer.json
@@ -21,6 +21,7 @@
         "hyperf/config": "~3.1.0",
         "hyperf/contract": "~3.1.0",
         "hyperf/coroutine": "~3.1.0",
+        "hyperf/polyfill-coroutine": "~3.1.0",
         "hyperf/stringable": "~3.1.0",
         "hyperf/support": "~3.1.0",
         "hyperf/tappable": "~3.1.0",