diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 9accbfe..211f078 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -34,6 +34,11 @@ jobs:
       BATSLIB_TEMP_PRESERVE: "0"
       BATSLIB_TEMP_PRESERVE_ON_FAILURE: "0"
     steps:
+      - name: Setup Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: 3.1
+
       - name: Install dependencies
         run: |
           npm install bats bats-support bats-assert