diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index b8e5a24e..49cadb25 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -8,6 +8,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2.3.4
+      with:
+        submodules: true
     - name: Unshallow
       run: git fetch --prune --unshallow
     - uses: serras/setup-stack@v3