diff --git a/.github/workflows/bld.yml b/.github/workflows/bld.yml
index 48df3ac..2473f3a 100644
--- a/.github/workflows/bld.yml
+++ b/.github/workflows/bld.yml
@@ -93,6 +93,7 @@ jobs:
       - name: Checkout source repository
         uses: actions/checkout@v3
         with:
+          submodules: 'true'
           fetch-depth: 0
 
       - name: Set up JDK ${{ matrix.java-version }}
diff --git a/.github/workflows/pages.yml b/.github/workflows/pages.yml
index 52d3467..40593df 100644
--- a/.github/workflows/pages.yml
+++ b/.github/workflows/pages.yml
@@ -32,6 +32,7 @@ jobs:
       - name: Checkout source repository
         uses: actions/checkout@v3
         with:
+          submodules: 'true'
           fetch-depth: 0
 
       - name: Set up JDK 17