diff --git a/.github/workflows/jekyll-build.yml b/.github/workflows/jekyll-build.yml
index b1dbf7cc..f0d58ea2 100644
--- a/.github/workflows/jekyll-build.yml
+++ b/.github/workflows/jekyll-build.yml
@@ -182,7 +182,7 @@ jobs:
       - name: Setup Ruby
         uses: ruby/setup-ruby@afeafc3d1ab54a631816aba4c914a0081c12ff2f  # v1.310.0
         with:
-          ruby-version: '3.3'
+          ruby-version: '3.4.9'
 
       - name: Install dependencies
         run: bundle install
diff --git a/Dockerfile b/Dockerfile
index db4c50d8..9066fb4e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:3.3-bookworm AS base
+FROM ruby:3.4-bookworm AS base
 
 SHELL ["/bin/bash", "-o", "pipefail", "-c"]