diff --git a/composer.json b/composer.json
index a5b23d5..69b2bbd 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,7 @@
     "phpcompatibility/phpcompatibility-wp": "^2.1",
     "wp-coding-standards/wpcs": "^3.0",
     "phpunit/phpunit": "^7|^9",
-    "yoast/phpunit-polyfills": "^2.0"
+    "yoast/phpunit-polyfills": "^1.1"
   },
   "repositories": [
     {