diff --git a/composer.json b/composer.json
index 889041e..43d28d2 100644
--- a/composer.json
+++ b/composer.json
@@ -24,7 +24,7 @@
     "react-parallel/infinite-pool": "^3.1.0",
     "react-parallel/pool-tests": "^5.1.0 || ^6.0.0",
     "react-parallel/stubs": "^1.2.0",
-    "wyrihaximus/async-test-utilities": "^12.2.0",
+    "wyrihaximus/async-test-utilities": "^13.3.0",
     "wyrihaximus/makefiles": "^0.12.3"
   },
   "minimum-stability": "dev",