diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b5f2283e1..8252bd0b8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,7 +20,7 @@ jobs:
       - name: Install Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: "3.2"
+          ruby-version: "4.0.0"
       - name: Checkout repo
         uses: actions/checkout@v4
       - name: Checkout submodules
diff --git a/.github/workflows/release-generators.yml b/.github/workflows/release-generators.yml
index 0a64d2918..0b12e8beb 100644
--- a/.github/workflows/release-generators.yml
+++ b/.github/workflows/release-generators.yml
@@ -18,7 +18,7 @@ jobs:
       - name: Install Ruby 3.4
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: "3.4"
+          ruby-version: "4.0.0"
       - name: Install tools
         run: "gem install --no-document toys"
       - name: execute
diff --git a/.github/workflows/tag-generators.yml b/.github/workflows/tag-generators.yml
index 82d9534f6..911caba7a 100644
--- a/.github/workflows/tag-generators.yml
+++ b/.github/workflows/tag-generators.yml
@@ -24,7 +24,7 @@ jobs:
       - name: Install Ruby 3.4
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: "3.4"
+          ruby-version: "4.0.0"
       - name: Install tools
         run: "gem install --no-document toys"
       - name: Execute