diff --git a/composer.json b/composer.json
index 835208e..c9eda71 100644
--- a/composer.json
+++ b/composer.json
@@ -18,7 +18,7 @@
         "react-parallel/event-loop": "^2.1.0",
         "react/event-loop": "^1.5",
         "react/promise": "^3.2",
-        "wyrihaximus/async-test-utilities": "^9.3.0",
+        "wyrihaximus/async-test-utilities": "^9.4.2",
         "wyrihaximus/pool-info": "^2.0"
     },
     "require-dev": {