diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 65012edf..a86345a0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,6 +16,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+        with:
+          submodules: true
       - uses: actions/setup-python@v4
         with:
           python-version: '3.11'