diff --git a/.github/workflows/check.yaml b/.github/workflows/check.yaml
index c01bb5c..b3244ef 100644
--- a/.github/workflows/check.yaml
+++ b/.github/workflows/check.yaml
@@ -19,6 +19,8 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
+        with:
+          submodules: true
 
       - name: Install R
         uses: s-u/R-actions/install@v2