diff --git a/composer.json b/composer.json
index 9692234ae..d3045974a 100644
--- a/composer.json
+++ b/composer.json
@@ -38,7 +38,7 @@
     "wp-cli/i18n-command": "2.2.13",
     "wp-phpunit/wp-phpunit": "5.8.2",
     "wpeverest/wpeverest-sniffs": "0.1.2",
-    "yoast/phpunit-polyfills": "1.0.3"
+    "yoast/phpunit-polyfills": "1.1.0"
   },
   "repositories": [
     {