diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index a1c49b94..cc2d2e85 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -28,6 +28,8 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
+      with:
+        submodules: recursive
 
     - uses: ilammy/msvc-dev-cmd@v1
       with: