diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index e103b0b..daa67df 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -26,6 +26,8 @@ jobs:
 
     steps:
     - uses: actions/checkout@v3
+      with:
+        submodules: recursive
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with: