diff --git a/.github/workflows/scheduled.yml b/.github/workflows/scheduled.yml
index a488b7d12..a75a97c51 100644
--- a/.github/workflows/scheduled.yml
+++ b/.github/workflows/scheduled.yml
@@ -31,7 +31,7 @@ jobs:
         uses: Homebrew/actions/setup-homebrew@master
 
       - name: Set up Ruby
-        uses: ruby/setup-ruby@v1
+        uses: ruby/setup-ruby@70da3bbf44ac06db1b0547ce2acc9380a5270d1e # v1.175.0
         with:
           ruby-version: "3.1"
           bundler-cache: true
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 9b6da3cad..28d0e10ca 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -21,7 +21,7 @@ jobs:
         uses: Homebrew/actions/setup-homebrew@master
 
       - name: Set up Ruby
-        uses: ruby/setup-ruby@v1
+        uses: ruby/setup-ruby@70da3bbf44ac06db1b0547ce2acc9380a5270d1e # v1.175.0
         with:
           ruby-version: "3.1"
           bundler-cache: true