diff --git a/.github/workflows/pr-build.yml b/.github/workflows/pr-build.yml
index 3792158d1..609e94d14 100644
--- a/.github/workflows/pr-build.yml
+++ b/.github/workflows/pr-build.yml
@@ -26,7 +26,7 @@ jobs:
       - name: Set up Ruby 3.2
         uses: ruby/setup-ruby@e65c17d16e57e481586a6a5a0282698790062f92 # v1.300.0
         with:
-          ruby-version: 3.4.9
+          ruby-version: 4.0.2
 
       - name: Install and Build 🔧
         run: |
diff --git a/.github/workflows/site-build.yml b/.github/workflows/site-build.yml
index b83d92552..b3c736639 100644
--- a/.github/workflows/site-build.yml
+++ b/.github/workflows/site-build.yml
@@ -26,7 +26,7 @@ jobs:
       - name: Set up Ruby 3.2
         uses: ruby/setup-ruby@e65c17d16e57e481586a6a5a0282698790062f92 # v1.300.0
         with:
-          ruby-version: 3.4.9
+          ruby-version: 4.0.2
 
       - name: Install and Build 🔧
         run: |