diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2c83e5ee..f2e48cc4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,12 +13,22 @@ jobs:
             ruby: 3.3
           - gemfile: rails_8_0
             ruby: 3.4
+          - gemfile: rails_8_0
+            ruby: "4.0"
+          - gemfile: rails_8_1
+            ruby: 3.2
+          - gemfile: rails_8_1
+            ruby: 3.3
+          - gemfile: rails_8_1
+            ruby: 3.4
+          - gemfile: rails_8_1
+            ruby: "4.0"
 
     name: ${{ matrix.gemfile }}, ruby ${{ matrix.ruby }}
     env:
       BUNDLE_GEMFILE: ${{ github.workspace }}/gemfiles/${{ matrix.gemfile }}.gemfile
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v7
 
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
diff --git a/Appraisals b/Appraisals
index fec3689c..710baee9 100644
--- a/Appraisals
+++ b/Appraisals
@@ -1,3 +1,7 @@
 appraise "rails_8_0" do
   gem "rails", "~> 8.0.0"
 end
+
+appraise "rails_8_1" do
+  gem "rails", "~> 8.1.0"
+end
diff --git a/gemfiles/rails_8_1.gemfile b/gemfiles/rails_8_1.gemfile
new file mode 100644
index 00000000..2c1eb8b9
--- /dev/null
+++ b/gemfiles/rails_8_1.gemfile
@@ -0,0 +1,13 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "rails", "~> 8.1.0"
+gem "rspec"
+gem "rspec-rails", "~> 8.0"
+gem "sqlite3", "~> 2.0"
+gem "debug"
+gem "appraisal"
+gem "nokogiri"
+
+gemspec path: "../"
diff --git a/spec/validates_timeliness/orm/active_record_spec.rb b/spec/validates_timeliness/orm/active_record_spec.rb
index 973c2435..154c68bf 100644
--- a/spec/validates_timeliness/orm/active_record_spec.rb
+++ b/spec/validates_timeliness/orm/active_record_spec.rb
@@ -107,6 +107,14 @@ class EmployeeWithParser < ActiveRecord::Base
         context 'timezone aware' do
           with_config(:default_timezone, 'Australia/Melbourne')
 
+          let(:expected_time) do
+            if ActiveRecord.gem_version >= Gem::Version.new('8.1')
+              Time.zone.local(2000, 1, 1, 12, 30)
+            else
+              '12:30'.in_time_zone
+            end
+          end
+
           before do
             unless ActiveRecord::Base.time_zone_aware_types.include?(:time)
               ActiveRecord::Base.time_zone_aware_types.push(:time)
@@ -116,7 +124,7 @@ class EmployeeWithParser < ActiveRecord::Base
           it 'should parse a string value' do
             record.birth_time = '12:30'
 
-            expect(record.birth_time).to eq('12:30'.in_time_zone)
+            expect(record.birth_time).to eq(expected_time)
             expect(Timeliness::Parser).to have_received(:parse)
           end
 
@@ -130,8 +138,8 @@ class EmployeeWithParser < ActiveRecord::Base
           it 'should store a Time value after parsing string' do
             record.birth_time = '12:30'
 
-            expect(record.birth_time).to eq('12:30'.in_time_zone)
-            expect(record.birth_time.utc_offset).to eq '12:30'.in_time_zone.utc_offset
+            expect(record.birth_time).to eq(expected_time)
+            expect(record.birth_time.utc_offset).to eq expected_time.utc_offset
           end
         end