diff --git a/.github/workflows/pr-build.yml b/.github/workflows/pr-build.yml
index 48122dc65..43ce439d6 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@ae195bbe749a7cef685ac729197124a48305c1cb # v1.276.0
         with:
-          ruby-version: 3.4.8
+          ruby-version: 4.0.0
 
       - name: Install and Build 🔧
         run: |
diff --git a/.github/workflows/site-build.yml b/.github/workflows/site-build.yml
index 433e7215c..85580eae3 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@ae195bbe749a7cef685ac729197124a48305c1cb # v1.276.0
         with:
-          ruby-version: 3.4.8
+          ruby-version: 4.0.0
 
       - name: Install and Build 🔧
         run: |