diff --git a/.github/workflows/gh-pages.yml b/.github/workflows/gh-pages.yml
index c65f8ffa..90055448 100644
--- a/.github/workflows/gh-pages.yml
+++ b/.github/workflows/gh-pages.yml
@@ -28,7 +28,7 @@ jobs:
         with:
           fetch-depth: 0 # need full history to get page last modified times
       - name: Setup Ruby
-        uses: ruby/setup-ruby@1198b074305f9356bd56dd4b311757cc0dab2f1c # v1.175.1
+        uses: ruby/setup-ruby@0cde4689ba33c09f1b890c1725572ad96751a3fc # v1.178.0
         with:
           ruby-version: '3.1'
           bundler-cache: true # runs 'bundle install' and caches installed gems automatically