diff --git a/composer.json b/composer.json
index 57655290bd..0b7f29f6bf 100644
--- a/composer.json
+++ b/composer.json
@@ -113,6 +113,6 @@
     "minimum-stability": "dev",
     "prefer-stable": true,
     "require-dev": {
-        "yoast/phpunit-polyfills": "^0.2.0"
+        "yoast/phpunit-polyfills": "^1.0.5"
     }
 }