diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9ac6a9c..f8ac606 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,6 +15,8 @@ jobs:
     steps:
     - name: Checkout
       uses: actions/checkout@v4
+      with:
+        submodules: recursive
 
     - name: Get Codex
       run: |