diff --git a/.github/workflows/emscripten.yml b/.github/workflows/emscripten.yml
index 39de2fb..7bc7747 100644
--- a/.github/workflows/emscripten.yml
+++ b/.github/workflows/emscripten.yml
@@ -10,6 +10,8 @@ jobs:
     steps:
 
     - uses: actions/checkout@v2
+      with:
+        submodules: true
 
     - name: Cache .emscripten_cache
       uses: actions/cache@v2