diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index 2e793dd..2577936 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -18,8 +18,8 @@ jobs:
       - name: Setup ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 2.1
-          bundler: 1.17
+          ruby-version: 2.7
+          bundler: 2.4.22
           bundler-cache: true
 
       - name: Run rubocop
@@ -34,44 +34,14 @@ jobs:
 
       matrix:
         ruby:
-          - 2.1
-          - 2.5
           - 2.7
           - 3.0
           - 3.1
           - 3.2
         rails:
-          - 3.2
-          - 4.2
-          - 5.2
           - 6.1
           - 7.0
-        exclude:
-          - rails: 5.2
-            ruby: 2.1
-          - rails: 6.1
-            ruby: 2.1
-          - rails: 7.0
-            ruby: 2.1
-          - rails: 7.0
-            ruby: 2.5
-          - rails: 3.2
-            ruby: 2.7
-          - rails: 4.2
-            ruby: 2.7
-          - rails: 3.2
-            ruby: 3.0
-          - rails: 4.2
-            ruby: 3.0
-          - rails: 3.2
-            ruby: 3.1
-          - rails: 4.2
-            ruby: 3.1
-          - rails: 3.2
-            ruby: 3.2
-          - rails: 4.2
-            ruby: 3.2
-
+          - 7.1
     steps:
       - name: Checkout source
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
@@ -80,7 +50,7 @@ jobs:
         uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby }}
-          bundler: 1.17
+          bundler: 2.4.22
           bundler-cache: true
         env:
           RAILS_VERSION: ${{ matrix.rails }}