diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index 7fa7174..0f1e169 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -25,6 +25,8 @@ jobs:
     steps:
     - name: checkout
       uses: actions/checkout@v3
+      with:
+        submodules: true
 
     - name: run-vcpkg
       uses: lukka/run-vcpkg@v10.7