diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index fb7c428..b235eb6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,24 +7,21 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby-version:
-          - '2.7'
-          - '3.0'
-          - '3.1'
-          - '3.2'
-        rails-version:
-          - '6.0'
-          - '6.1'
-          - '7.0'
-    name: 'Ruby ${{ matrix.ruby-version }}, Rails ${{ matrix.rails-version }}'
+        # To keep matrix size down, only test highest and lowest rubies.
+        ruby: ["2.7", "3.3"]
+        rails: ["6.1", "7.0", "7.1", "7.2"]
+        exclude:
+          - ruby: "2.7"
+            rails: "7.2"
+    name: Ruby ${{ matrix.ruby }}, Rails ${{ matrix.rails }}
     runs-on: ubuntu-latest
+    env:
+      BUNDLE_GEMFILE: ${{ github.workspace }}/gemfiles/rails_${{ matrix.rails }}.gemfile
     steps:
-      - uses: actions/checkout@v3
-      - uses: supercharge/mongodb-github-action@1.9.0
+      - uses: actions/checkout@v4
+      - uses: supercharge/mongodb-github-action@1.11.0
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: '${{ matrix.ruby-version }}'
+          ruby-version: ${{ matrix.ruby }}
           bundler-cache: true
-        env:
-          TEST_RAILS_VERSION: '${{ matrix.rails-version }}'
       - run: bundle exec rake
diff --git a/.gitignore b/.gitignore
index 1195069..a6a28c0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,5 +10,5 @@ wiki
 .ruby-version
 .ruby-gemset
 Gemfile.lock
+gemfiles/*.gemfile.lock
 tmp
-
diff --git a/Appraisals b/Appraisals
new file mode 100644
index 0000000..fe1e44a
--- /dev/null
+++ b/Appraisals
@@ -0,0 +1,27 @@
+appraise "rails-6.1" do
+  group :development do
+    gem "rails", "~> 6.1.0"
+  end
+end
+
+appraise "rails-7.0" do
+  group :development do
+    gem "rails", "~> 7.0.0"
+  end
+end
+
+appraise "rails-7.1" do
+  group :development do
+    gem "rails", "~> 7.1.0"
+  end
+end
+
+appraise "rails-7.2" do
+  group :development do
+    gem "rails", "~> 7.2.0"
+    gem "sqlite3", "~> 2.0.0"
+    group :mongo do
+      gem "mongoid", github: "mongodb/mongoid"
+    end
+  end
+end
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 97d9e0e..0346035 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 * Treat true/false as YES/NO when assigned as strings for xboolean filter
 * Support infinite ranges for date, datetime and integer filters
 * Treat `ActiveRecord::Result` class as `Array` driver
+* Drop support of Rails 6.0 [#326](https://github.com/bogdan/datagrid/pull/326)
 
 ## 1.8.1
 
@@ -20,9 +21,9 @@
 ## 1.7.0
 
 * Depend on `railties` instead of `rails` to prevent loading of unnecessary frameworks
-* Bugfix `File.exist?` usage for ruby 3.0 [#307](https://github.com/bogdan/datagrid/issues/307)
-* Drop support of old Ruby versions (< 2.7)
-* Drop support of old Rails versions (< 6.0)
+* Bugfix `File.exist?` usage for Ruby 3.0 [#307](https://github.com/bogdan/datagrid/issues/307)
+* Drop support of old Ruby versions (< 2.7) [#305](https://github.com/bogdan/datagrid/pull/305)
+* Drop support of old Rails versions (< 6.0) [#305](https://github.com/bogdan/datagrid/pull/305)
 
 ## 1.6.3
 
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000..d679ba7
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,37 @@
+# Contributing to Datagrid
+
+## Issues
+
+Please use GitHub issues for bug reports and feature suggestions.
+
+## Development
+
+### Testing
+
+Tests can be run against different versions of Rails:
+
+**Using appraisals (recommended)**
+
+``` shell
+# Install the dependencies for each appraisal
+bundle install
+bundle exec appraisal install
+
+# Run tests against Rails 7.2
+bundle exec appraisal rails-7.2 rake
+
+# Run tests against Rails 6.1
+bundle exec appraisal rails-6.1 rake
+```
+
+**Using BUNDLE_GEMFILE**
+
+``` shell
+# Run tests against Rails 7.2
+BUNDLE_GEMFILE=gemfiles/rails_7.2.gemfile bundle install
+BUNDLE_GEMFILE=gemfiles/rails_7.2.gemfile bundle exec rake
+
+# Run tests against Rails 6.1
+BUNDLE_GEMFILE=gemfiles/rails_6.1.gemfile bundle install
+BUNDLE_GEMFILE=gemfiles/rails_6.1.gemfile bundle exec rake
+```
diff --git a/Gemfile b/Gemfile
index 4fbc145..3b72ddd 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,21 +3,17 @@ source "https://rubygems.org"
 gemspec
 
 group :development do
-  rails_version = ENV['TEST_RAILS_VERSION']
-  gem "rails", "~> #{rails_version}" if rails_version
+  gem "appraisal"
   gem "bump"
-
+  gem "csv" # removed from standard library in Ruby 3.4
+  gem "nokogiri" # used to test html output
   gem "pry-byebug"
-
   gem "rspec"
-  gem "nokogiri" # used to test html output
-
-  gem "sqlite3", '~> 1.4.0'
   gem "sequel"
-  gem "activerecord"
+  gem "sqlite3", "~> 1.7.0"
 
   group :mongo do
-    gem "mongoid", '~> 9.0.0'
     gem "bson"
+    gem "mongoid", "~> 9.0"
   end
 end
diff --git a/Readme.markdown b/Readme.markdown
index 5920042..8a25e9f 100644
--- a/Readme.markdown
+++ b/Readme.markdown
@@ -22,7 +22,6 @@ A really mighty and flexible ruby library that generates reports including admin
 
 [Create an issue](https://github.com/bogdan/datagrid/issues/new) if you want more.
 
-
 ### Documentation
 
 * [Readme](/Readme.markdown) - this read-me for basic information
@@ -101,7 +100,6 @@ In order to create a report, you need to define:
 * filters that will be used to filter data
 * columns that should be displayed and sortable (if possible)
 
-
 ### Scope
 
 Default scope of objects to filter and display.
@@ -139,7 +137,6 @@ Datagrid supports different type of filters including:
 
 [More about filters](https://github.com/bogdan/datagrid/wiki/Filters)
 
-
 ### Columns
 
 Each column is represented by name and code block to calculate the value.
@@ -193,6 +190,10 @@ All advanced frontend things are described in:
 
 If you have a question of any kind, just make an issue and describe your problem in details.
 
+## Contribution
+
+If you are interested in contributing to this project, please follow the [instructions here](CONTRIBUTING.md).
+
 ## Self-Promotion
 
 Like datagrid?
@@ -201,6 +202,5 @@ Follow the repository on [GitHub](https://github.com/bogdan/datagrid).
 
 Read [author blog](http://gusiev.com).
 
-
 ## License
 [![FOSSA Status](https://app.fossa.io/api/projects/git%2Bgithub.com%2Fbogdan%2Fdatagrid.svg?type=large)](https://app.fossa.io/projects/git%2Bgithub.com%2Fbogdan%2Fdatagrid?ref=badge_large)
diff --git a/datagrid.gemspec b/datagrid.gemspec
index 0c8ad16..44299c9 100644
--- a/datagrid.gemspec
+++ b/datagrid.gemspec
@@ -32,6 +32,6 @@ Gem::Specification.new do |s|
     "source_code_uri" => s.homepage,
   }
 
-  s.add_dependency "railties", ">= 6.0"
+  s.add_dependency "railties", ">= 6.1"
 end
 
diff --git a/gemfiles/rails_6.1.gemfile b/gemfiles/rails_6.1.gemfile
new file mode 100644
index 0000000..d92e1f4
--- /dev/null
+++ b/gemfiles/rails_6.1.gemfile
@@ -0,0 +1,22 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+group :development do
+  gem "appraisal"
+  gem "bump"
+  gem "csv"
+  gem "nokogiri"
+  gem "pry-byebug"
+  gem "rspec"
+  gem "sequel"
+  gem "sqlite3", "~> 1.7.0"
+  gem "rails", "~> 6.1.0"
+
+  group :mongo do
+    gem "bson"
+    gem "mongoid", "~> 9.0"
+  end
+end
+
+gemspec path: "../"
diff --git a/gemfiles/rails_7.0.gemfile b/gemfiles/rails_7.0.gemfile
new file mode 100644
index 0000000..92a7e74
--- /dev/null
+++ b/gemfiles/rails_7.0.gemfile
@@ -0,0 +1,22 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+group :development do
+  gem "appraisal"
+  gem "bump"
+  gem "csv"
+  gem "nokogiri"
+  gem "pry-byebug"
+  gem "rspec"
+  gem "sequel"
+  gem "sqlite3", "~> 1.7.0"
+  gem "rails", "~> 7.0.0"
+
+  group :mongo do
+    gem "bson"
+    gem "mongoid", "~> 9.0"
+  end
+end
+
+gemspec path: "../"
diff --git a/gemfiles/rails_7.1.gemfile b/gemfiles/rails_7.1.gemfile
new file mode 100644
index 0000000..ab3907f
--- /dev/null
+++ b/gemfiles/rails_7.1.gemfile
@@ -0,0 +1,22 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+group :development do
+  gem "appraisal"
+  gem "bump"
+  gem "csv"
+  gem "nokogiri"
+  gem "pry-byebug"
+  gem "rspec"
+  gem "sequel"
+  gem "sqlite3", "~> 1.7.0"
+  gem "rails", "~> 7.1.0"
+
+  group :mongo do
+    gem "bson"
+    gem "mongoid", "~> 9.0"
+  end
+end
+
+gemspec path: "../"
diff --git a/gemfiles/rails_7.2.gemfile b/gemfiles/rails_7.2.gemfile
new file mode 100644
index 0000000..d1385b0
--- /dev/null
+++ b/gemfiles/rails_7.2.gemfile
@@ -0,0 +1,22 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+group :development do
+  gem "appraisal"
+  gem "bump"
+  gem "csv"
+  gem "nokogiri"
+  gem "pry-byebug"
+  gem "rspec"
+  gem "sequel"
+  gem "sqlite3", "~> 2.0.0"
+  gem "rails", "~> 7.2.0"
+
+  group :mongo do
+    gem "bson"
+    gem "mongoid", github: "mongodb/mongoid"
+  end
+end
+
+gemspec path: "../"