diff --git a/.github/workflows/gh-pages.yml b/.github/workflows/gh-pages.yml
index 2c33dfe..613798f 100644
--- a/.github/workflows/gh-pages.yml
+++ b/.github/workflows/gh-pages.yml
@@ -25,7 +25,7 @@ jobs:
         with:
           fetch-depth: 0 # need full history to get page last modified times
       - name: Setup Ruby
-        uses: ruby/setup-ruby@22fdc77bf4148f810455b226c90fb81b5cbc00a7 # v1.171.0
+        uses: ruby/setup-ruby@1198b074305f9356bd56dd4b311757cc0dab2f1c # v1.175.1
         with:
           ruby-version: '3.1'
           bundler-cache: true # runs 'bundle install' and caches installed gems automatically