diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a0bb9723..d2ec7970 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -36,6 +36,9 @@ jobs:
           - os: ubuntu-latest
             ruby: "3.2"
             tool: test
+          - os: ubuntu-latest
+            ruby: "3.3"
+            tool: test
           - os: ubuntu-latest
             ruby: "jruby"
             tool: test
@@ -46,16 +49,16 @@ jobs:
             ruby: "2.4"
             tool: test
           - os: macos-latest
-            ruby: "3.2"
+            ruby: "3.3"
             tool: test
           - os: windows-latest
             ruby: "2.4"
             tool: test
           - os: windows-latest
-            ruby: "3.2"
+            ruby: "3.3"
             tool: test
           - os: ubuntu-latest
-            ruby: "3.2"
+            ruby: "3.3"
             tool: "rubocop , yardoc , build"
       fail-fast: false
     runs-on: ${{ matrix.os }}
diff --git a/.github/workflows/release-hook-on-closed.yml b/.github/workflows/release-hook-on-closed.yml
index 33d7a967..914f39c2 100644
--- a/.github/workflows/release-hook-on-closed.yml
+++ b/.github/workflows/release-hook-on-closed.yml
@@ -8,7 +8,7 @@ jobs:
   release-process-request:
     if: ${{ github.repository == 'dazuma/toys' }}
     env:
-      ruby_version: "3.2"
+      ruby_version: "3.3"
     runs-on: ubuntu-latest
     steps:
       - name: Install Ruby ${{ env.ruby_version }}
diff --git a/.github/workflows/release-hook-on-push.yml b/.github/workflows/release-hook-on-push.yml
index 53b018aa..592bbc79 100644
--- a/.github/workflows/release-hook-on-push.yml
+++ b/.github/workflows/release-hook-on-push.yml
@@ -9,7 +9,7 @@ jobs:
   release-update-open-requests:
     if: ${{ github.repository == 'dazuma/toys' }}
     env:
-      ruby_version: "3.2"
+      ruby_version: "3.3"
     runs-on: ubuntu-latest
     steps:
       - name: Install Ruby ${{ env.ruby_version }}
diff --git a/.github/workflows/release-perform.yml b/.github/workflows/release-perform.yml
index 70255f97..bad09891 100644
--- a/.github/workflows/release-perform.yml
+++ b/.github/workflows/release-perform.yml
@@ -18,7 +18,7 @@ jobs:
   release-perform:
     if: ${{ github.repository == 'dazuma/toys' }}
     env:
-      ruby_version: "3.2"
+      ruby_version: "3.3"
     runs-on: ubuntu-latest
     steps:
       - name: Install Ruby ${{ env.ruby_version }}
diff --git a/.github/workflows/release-request.yml b/.github/workflows/release-request.yml
index 9c148b57..1fed7655 100644
--- a/.github/workflows/release-request.yml
+++ b/.github/workflows/release-request.yml
@@ -12,7 +12,7 @@ jobs:
   release-request:
     if: ${{ github.repository == 'dazuma/toys' }}
     env:
-      ruby_version: "3.2"
+      ruby_version: "3.3"
     runs-on: ubuntu-latest
     steps:
       - name: Install Ruby ${{ env.ruby_version }}
diff --git a/.github/workflows/release-retry.yml b/.github/workflows/release-retry.yml
index d1a4865d..6d3de987 100644
--- a/.github/workflows/release-retry.yml
+++ b/.github/workflows/release-retry.yml
@@ -15,7 +15,7 @@ jobs:
   release-retry:
     if: ${{ github.repository == 'dazuma/toys' }}
     env:
-      ruby_version: "3.2"
+      ruby_version: "3.3"
     runs-on: ubuntu-latest
     steps:
       - name: Install Ruby ${{ env.ruby_version }}