diff --git a/.github/workflows/pr-build.yml b/.github/workflows/pr-build.yml
index b95007675..a9fcb53eb 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@675dd7ba1b06c8786a1480d89c384f5620a42647 # v1.281.0
         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 03e3435d8..732efad58 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@675dd7ba1b06c8786a1480d89c384f5620a42647 # v1.281.0
         with:
-          ruby-version: 3.4.8
+          ruby-version: 4.0.0
 
       - name: Install and Build 🔧
         run: |