diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c04a80e..5acf00d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,7 +8,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 3.4.4
+          ruby-version: 4.0.0
       - name: Install dependencies
         run: bundle install --jobs 4 --retry 3
       - name: Run Danger
@@ -21,10 +21,10 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: [3.4.4, 3.3.8, 3.2.8, 3.1.7]
-        grape-version: ['~> 2.3.0', '~> 3.0']
+        ruby-version: [4.0.0, 3.4.8, 3.3.10, 3.2.9]
+        grape-version: ['~> 3.0.0', '~> 2.3.0']
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby-version }}
diff --git a/Gemfile b/Gemfile
index abf0d65..fcd188f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,7 +2,7 @@ source 'https://rubygems.org'
 
 gemspec
 
-case version = ENV['GRAPE_VERSION'] || '~> 2.3.0'
+case version = ENV['GRAPE_VERSION'] || '~> 3.0.0'
 when 'HEAD'
   gem 'grape', github: 'intridea/grape'
 else