diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 84c7da4..7e0f1ee 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,8 +7,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ['3.1', '3.2', '3.3']
-        rails: ['7.1', '7.2', '8.0', 'edge']
+        ruby: ['3.1', '3.2', '3.3', '3.4', '4.0']
+        rails: ['7.1', '7.2', '8.0', '8.1', 'edge']
         include:
           - ruby: '2.7'
             rails: '7.1'
@@ -18,6 +18,10 @@ jobs:
           - ruby: '3.1'
             rails: '8.0'
           - ruby: '3.1'
+            rails: '8.1'
+          - ruby: '3.1'
+            rails: 'edge'
+          - ruby: '3.2'
             rails: 'edge'
     env:
       BUNDLE_GEMFILE: gemfiles/rails_${{ matrix.rails }}.gemfile
diff --git a/gemfiles/rails_8.1.gemfile b/gemfiles/rails_8.1.gemfile
new file mode 100644
index 0000000..ecdce5a
--- /dev/null
+++ b/gemfiles/rails_8.1.gemfile
@@ -0,0 +1,11 @@
+source "https://rubygems.org"
+
+gem "actionpack", github: "rails/rails", branch: "8-1-stable"
+gem "activerecord", github: "rails/rails", branch: "8-1-stable"
+gem "railties", github: "rails/rails", branch: "8-1-stable"
+
+gem "rack", ">= 2.2.4", "< 4"
+gem "sqlite3"
+
+gemspec :path => "../"
+