diff --git a/.github/workflows/pr-build.yml b/.github/workflows/pr-build.yml
index 101998b0c..8712ff081 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@4c56a21280b36d862b5fc31348f463d60bdc55d5 # v1.301.0
         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 3c61c438e..016cabb9c 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@4c56a21280b36d862b5fc31348f463d60bdc55d5 # v1.301.0
         with:
-          ruby-version: 3.4.9
+          ruby-version: 4.0.2
 
       - name: Install and Build 🔧
         run: |