diff --git a/.github/workflows/publish.yaml b/.github/workflows/publish.yaml
index 2d807235..307ff4c7 100644
--- a/.github/workflows/publish.yaml
+++ b/.github/workflows/publish.yaml
@@ -11,6 +11,7 @@ jobs:
       - uses: actions/checkout@master
         with:
           ref: ${{ github.ref }}
+      - uses: textbook/git-checkout-submodule-action@master
       - name: Set up JDK
         uses: actions/setup-java@v1
         with:
@@ -32,6 +33,7 @@ jobs:
       - uses: actions/checkout@master
         with:
           ref: ${{ github.ref }}
+      - uses: textbook/git-checkout-submodule-action@master
       - name: Set up JDK
         uses: actions/setup-java@v1
         with:
diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index f19f1627..01585157 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -19,6 +19,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
+      - uses: textbook/git-checkout-submodule-action@master
 
       - name: Set up JDK
         uses: actions/setup-java@v1
@@ -55,6 +56,7 @@ jobs:
           --health-retries 5
     steps:
       - uses: actions/checkout@v2
+      - uses: textbook/git-checkout-submodule-action@master
 
       - name: Set up JDK
         uses: actions/setup-java@v1