diff --git a/.github/workflows/prebuild.yml b/.github/workflows/prebuild.yml
index ee8bdce0..9db740a9 100644
--- a/.github/workflows/prebuild.yml
+++ b/.github/workflows/prebuild.yml
@@ -17,6 +17,9 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
+      - run: |
+          git submodule init
+          git submodule update
 
       - if: ${{ matrix.os == 'ubuntu-latest' }}
         run: sudo apt-get install -y build-essential libxi-dev libglu1-mesa-dev libglew-dev pkg-config -y