diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b9a22a1..f9c25b8 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -8,6 +8,8 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
+        with:
+          submodules: true
       - name: Set up JDK 17
         uses: actions/setup-java@v2
         with: