diff --git a/.github/workflows/pr-build.yml b/.github/workflows/pr-build.yml
index 817633f2c..03e275601 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@0dafeac902942906541bc140009cdbf32665b601 # v1.315.0
         with:
-          ruby-version: 3.4.10
+          ruby-version: 4.0.5
 
       - name: Install and Build 🔧
         run: |
diff --git a/.github/workflows/site-build.yml b/.github/workflows/site-build.yml
index 10ae09efa..c80a6c3e8 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@0dafeac902942906541bc140009cdbf32665b601 # v1.315.0
         with:
-          ruby-version: 3.4.10
+          ruby-version: 4.0.5
 
       - name: Install and Build 🔧
         run: |