diff --git a/.eslintrc.js b/.eslintrc.js
index 40978c1f327..6bd3e4538d0 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -150,7 +150,7 @@ module.exports = {
     // Enforces consistent file extension
     'rulesdir/extensions': 'error',
     // Enforces license headers on files
-    'rulesdir/check-license': 'warn',
+    'rulesdir/check-license': 'error',
   },
   overrides: [
     {