diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 7725cc9..a2ceba9 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -23,10 +23,10 @@ jobs:
           fetch-depth: 0
           ssh-key: ${{ secrets.RELEASE_SSH_KEY }}
       -
-        name: Set up Ruby 3.2
+        name: Set up Ruby 3.3
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: "3.2"
+          ruby-version: "3.3"
           bundler-cache: true
       -
         name: Update version
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 8d60b3e..799800a 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -15,10 +15,10 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-      - name: Set up Ruby 3.2
+      - name: Set up Ruby 3.3
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: "3.2"
+          ruby-version: "3.3"
           bundler-cache: true
       - name: Lint
         run: bundle exec rake rubocop
@@ -30,7 +30,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ["3.0", "3.1", "3.2"]
+        ruby: ["3.0", "3.1", "3.2", "3.3"]
         oj: [false, true]
     steps:
       - name: Checkout
diff --git a/.ruby-version b/.ruby-version
index be94e6f..15a2799 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-3.2.2
+3.3.0