diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 5d227a5..1a0de2e 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -14,6 +14,6 @@ jobs:
     - uses: actions/checkout@v2
     - uses: ruby/setup-ruby@v1
       with:
-        ruby-version: 2.6
+        ruby-version: 3.3
         bundler-cache: true  # runs 'bundle install' and caches installed gems automatically
     - run: bundle exec jekyll build