diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index fdcbe52..463ccb2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,7 +17,7 @@ jobs:
       - name: 'Set up Ruby'
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: '3.2.2'
+          ruby-version: '3.3.0'
       - name: 'Check the environment'
         run: |
           ruby --version
@@ -62,9 +62,12 @@ jobs:
           - { 'rails': '6.1', 'ruby': '3.0.6' }
           - { 'rails': '6.1', 'ruby': '3.1.4' }
           - { 'rails': '6.1', 'ruby': '3.2.2' }
+          - { 'rails': '6.1', 'ruby': '3.3.0' }
           - { 'rails': '7.0', 'ruby': '3.0.6' }
           - { 'rails': '7.0', 'ruby': '3.1.4' }
           - { 'rails': '7.0', 'ruby': '3.2.2' }
+          - { 'rails': '7.0', 'ruby': '3.3.0' }
           - { 'rails': '7.1', 'ruby': '3.0.6' }
           - { 'rails': '7.1', 'ruby': '3.1.4' }
           - { 'rails': '7.1', 'ruby': '3.2.2' }
+          - { 'rails': '7.1', 'ruby': '3.3.0' }
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 017ecc9..5c6f643 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -18,7 +18,7 @@ jobs:
       - name: 'Set up Ruby'
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: '3.2.2'
+          ruby-version: '3.3.0'
 
       - name: 'Publish to RubyGems'
         run: |
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 98c77c2..c336f19 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,8 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 
 ### Added
 
+- Add official support for Ruby 3.3 (#156)
+
 ### Changed
 
 ### Deprecated