diff --git a/.github/workflows/pr-build.yml b/.github/workflows/pr-build.yml
index f6c30dd9c..55b1e541d 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@4c24fa5ec04b2e79eb40571b1cee2a0d2b705771 # v1.278.0
         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 7e1924eb3..e854f36bb 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@4c24fa5ec04b2e79eb40571b1cee2a0d2b705771 # v1.278.0
         with:
-          ruby-version: 3.4.8
+          ruby-version: 4.0.0
 
       - name: Install and Build 🔧
         run: |