diff --git a/.github/workflows/copilot-setup-steps.yml b/.github/workflows/copilot-setup-steps.yml
index 702860569..ef0b122e1 100644
--- a/.github/workflows/copilot-setup-steps.yml
+++ b/.github/workflows/copilot-setup-steps.yml
@@ -39,3 +39,9 @@ jobs:
 
       - name: Install Composer dependencies
         run: composer install --prefer-dist --no-interaction
+
+      - name: Clone extension stubs
+        uses: actions/checkout@v4
+        with:
+          repository: pmmp/phpstorm-stubs
+          path: extension-stubs