diff --git a/.github/workflows/check_pull_request.yml b/.github/workflows/check_pull_request.yml
index 2f5e025..ce8e780 100644
--- a/.github/workflows/check_pull_request.yml
+++ b/.github/workflows/check_pull_request.yml
@@ -18,6 +18,7 @@ jobs:
         uses: actions/checkout@v6.0.2
         with:
           fetch-depth: 0
+          submodules: "true"
           ref: ${{ github.event.pull_request.head.sha }}
       - name: Run check
         run: make openapi/check/gitignore
\ No newline at end of file