diff --git a/.github/workflows/bump-version.yml b/.github/workflows/bump-version.yml
index 750a056d78d8..b5c271179b91 100644
--- a/.github/workflows/bump-version.yml
+++ b/.github/workflows/bump-version.yml
@@ -24,7 +24,7 @@ jobs:
       - name: Install Ruby 3.3
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: "3.3"
+          ruby-version: "4.0.0"
       - name: Install tools
         run: |
           gem install --no-document toys
diff --git a/.github/workflows/delete-library.yml b/.github/workflows/delete-library.yml
index 9a170c500fb3..b1154f79c3c9 100644
--- a/.github/workflows/delete-library.yml
+++ b/.github/workflows/delete-library.yml
@@ -22,7 +22,7 @@ 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
diff --git a/.github/workflows/new-library.yml b/.github/workflows/new-library.yml
index eef65769874c..24e8084b8183 100644
--- a/.github/workflows/new-library.yml
+++ b/.github/workflows/new-library.yml
@@ -19,7 +19,7 @@ jobs:
     - name: Install Ruby 3.3
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: "3.3"
+        ruby-version: "4.0.0"
     - name: Install Bazel
       uses: bazel-contrib/setup-bazel@0.16.0
     - name: Install tools
diff --git a/.github/workflows/owlbot.yml b/.github/workflows/owlbot.yml
index f87402f829bb..4b28a00d72da 100644
--- a/.github/workflows/owlbot.yml
+++ b/.github/workflows/owlbot.yml
@@ -22,7 +22,7 @@ jobs:
     - name: Install Ruby 3.3
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: "3.3"
+        ruby-version: "4.0.0"
     - name: Install Bazel
       uses: bazel-contrib/setup-bazel@0.16.0
     - name: Install tools
diff --git a/.github/workflows/release-please-now.yml b/.github/workflows/release-please-now.yml
index ee1c0d8e7275..7d993da67b50 100644
--- a/.github/workflows/release-please-now.yml
+++ b/.github/workflows/release-please-now.yml
@@ -25,7 +25,7 @@ jobs:
       - name: Install Ruby 3.3
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: "3.3"
+          ruby-version: "4.0.0"
       - name: Install tools
         run: |
           gem install --no-document toys
diff --git a/.github/workflows/storage-retry-conformance-test-against-emulator.yaml b/.github/workflows/storage-retry-conformance-test-against-emulator.yaml
index 8072055dfa1e..22bfa4264ca2 100644
--- a/.github/workflows/storage-retry-conformance-test-against-emulator.yaml
+++ b/.github/workflows/storage-retry-conformance-test-against-emulator.yaml
@@ -26,7 +26,7 @@ jobs:
       - uses: actions/checkout@v6
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: '3.3'
+          ruby-version: '4.0.0'
       - run: ruby --version
       - run: gem install toys
       - run: bundle install
diff --git a/.github/workflows/tombstone-library.yml b/.github/workflows/tombstone-library.yml
index a305a06fc8b2..7363605df3b5 100644
--- a/.github/workflows/tombstone-library.yml
+++ b/.github/workflows/tombstone-library.yml
@@ -22,7 +22,7 @@ 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
diff --git a/.github/workflows/update-pr.yml b/.github/workflows/update-pr.yml
index fc23990a7158..39c90f2639dc 100644
--- a/.github/workflows/update-pr.yml
+++ b/.github/workflows/update-pr.yml
@@ -26,7 +26,7 @@ jobs:
     - name: Install Ruby 3.3
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: "3.3"
+        ruby-version: "4.0.0"
     - name: Install tools
       run: |
         gem install --no-document toys