diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4dc97a0c..b8f1af4e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -71,7 +71,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Setup Ruby
-        uses: ruby/setup-ruby@v1
+        uses: ruby/setup-ruby@e8944e80fb94b20106697132f8c20c665fab29e9 # v1.325.0
         with:
           ruby-version: "3.2"
           bundler-cache: true