diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index c9d5efc346c..20de323907d 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -36,7 +36,7 @@ jobs:
       - run: rm -f Gemfile Gemfile.lock
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 2.7
+          ruby-version: 2.7.8
           bundler-cache: false
       - run: sudo .github/install-woff.sh
       - run: .github/make-icons.sh icons