diff --git a/composer.json b/composer.json
index c7e8d8e..82c103b 100644
--- a/composer.json
+++ b/composer.json
@@ -25,7 +25,7 @@
   },
   "require-dev": {
     "react-parallel/pool-tests": "^5.1.0 || ^6.0.0",
-    "wyrihaximus/async-test-utilities": "^12.2.0",
+    "wyrihaximus/async-test-utilities": "^13.1.0",
     "wyrihaximus/makefiles": "^0.10.6"
   },
   "autoload": {