diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1b1bb46ff0..50d2cb9f56 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,6 +20,8 @@ jobs:
     needs: activate
     steps:
     - uses: actions/checkout@v2
+      with:
+        submodules: recursive
 
     - name: Install dependencies
       run: |