diff --git a/.github/workflows/pr-build.yml b/.github/workflows/pr-build.yml
index bad64ac58..87446780f 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@6aaa311d81eba98ae12eaffbcb63296ace0efcde # v1.307.0
         with:
-          ruby-version: 3.4.9
+          ruby-version: 4.0.4
 
       - name: Install and Build 🔧
         run: |
diff --git a/.github/workflows/site-build.yml b/.github/workflows/site-build.yml
index 923f4ca3f..6ff29a51b 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@6aaa311d81eba98ae12eaffbcb63296ace0efcde # v1.307.0
         with:
-          ruby-version: 3.4.9
+          ruby-version: 4.0.4
 
       - name: Install and Build 🔧
         run: |