diff --git a/.github/workflows/javascript.yml b/.github/workflows/javascript.yml
index 8e88c8f..79bd1c6 100644
--- a/.github/workflows/javascript.yml
+++ b/.github/workflows/javascript.yml
@@ -18,7 +18,7 @@ jobs:
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: '3.3'
+        ruby-version: '3.4'
         bundler-cache: true
     - uses: pnpm/action-setup@v4
     - name: Set up Node
diff --git a/.github/workflows/rubocop.yml b/.github/workflows/rubocop.yml
index 8475445..4cfe630 100644
--- a/.github/workflows/rubocop.yml
+++ b/.github/workflows/rubocop.yml
@@ -19,7 +19,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        ruby-version: ['3.3']
+        ruby-version: ['3.4']
 
     steps:
     - uses: actions/checkout@v4
diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index 0ddad4b..9cf0e27 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: ['3.1', '3.2', '3.3']
+        ruby-version: ['3.1', '3.2', '3.3', '3.4']
         gemfile: [ csv_22.0 ]
         channel: ['stable']
 
@@ -32,6 +32,9 @@ jobs:
           - ruby-version: '3.3'
             gemfile: csv_edge
             channel: 'experimental'
+          - ruby-version: '3.4'
+            gemfile: csv_edge
+            channel: 'experimental'
           - ruby-version: 'head'
             gemfile: csv_edge
             channel: 'experimental'
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4ca4612..989b8d2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,7 +3,7 @@
 ## 17.0.0 / unreleased
 
 * [FEATURE] Drop Internet Explorer and other older browsers support
-* [ENHANCEMENT] Test against Ruby 3.3
+* [ENHANCEMENT] Test against Ruby 3.3 and 3.4
 * [ENHANCEMENT] Update QUnit to 2.23.0
 
 ## 16.0.0 / 2023-09-02