diff --git a/.circleci/config.yml b/.circleci/config.yml
index 425b0690..85bacf45 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -21,26 +21,30 @@ shared_build_steps: &shared_build_steps
   - run:
       name: Storing Rails Version
       command: |
-        echo "$RUBY_VERSION/$RAILS_VERSION" > RAILS_VERSION
-        cat RAILS_VERSION
+        echo "$RUBY_VERSION/$BUNDLE_GEMFILE" > CACHE_ENV_VERSION
+        cat CACHE_ENV_VERSION
+        # To generate cache checksum, we need a static file, but Gemfile is
+        # based on the Rails version we are testing against. This step just puts
+        # a dynamically identified file into a known path.
+        cat "$BUNDLE_GEMFILE" > CACHE_GEMFILE
 
   # Download and cache dependencies
   - restore_cache:
       keys:
-      - dependencies-{{ .Environment.CACHE_VERSION }}-{{ checksum "RAILS_VERSION" }}-{{ checksum "Gemfile" }}-{{ checksum "meta-tags.gemspec" }}
+      - dependencies-{{ .Environment.CACHE_VERSION }}-{{ checksum "CACHE_ENV_VERSION" }}-{{ checksum "CACHE_GEMFILE" }}-{{ checksum "meta-tags.gemspec" }}
       # fallback to using the latest cache if no exact match is found
-      - dependencies-{{ .Environment.CACHE_VERSION }}-{{ checksum "RAILS_VERSION" }}
+      - dependencies-{{ .Environment.CACHE_VERSION }}-{{ checksum "CACHE_ENV_VERSION" }}
 
   - run:
       name: Installing Dependencies
       command: |
-        bundle config set --local path vendor/bundle
+        bundle config set --local path "${PWD}/vendor/bundle"
         bundle check || (bundle install --jobs=4 --retry=3 && bundle clean)
 
   - save_cache:
       paths:
         - ./vendor/bundle
-      key: dependencies-{{ .Environment.CACHE_VERSION }}-{{ checksum "RAILS_VERSION" }}-{{ checksum "Gemfile" }}-{{ checksum "meta-tags.gemspec" }}
+      key: dependencies-{{ .Environment.CACHE_VERSION }}-{{ checksum "CACHE_ENV_VERSION" }}-{{ checksum "CACHE_GEMFILE" }}-{{ checksum "meta-tags.gemspec" }}
 
   # run tests!
   - run:
@@ -89,7 +93,7 @@ shared_build_steps: &shared_build_steps
 
 jobs:
   
-  build-ruby26-rails-5_1_7:
+  build-ruby26-rails-51:
     parameters:
       is_main_build:
         type: boolean
@@ -97,13 +101,13 @@ jobs:
     docker:
       - image: cimg/ruby:2.6
         environment:
-          RAILS_VERSION: 5.1.7
+          BUNDLE_GEMFILE: gemfiles/rails_5.1.gemfile
           ENABLE_CODE_COVERAGE: 1
           NO_STEEP: 1
-    working_directory: ~/meta-tags/ruby26-rails-5.1.7
+    working_directory: ~/meta-tags/ruby26-rails-51
     steps: *shared_build_steps
   
-  build-ruby26-rails-5_2_8:
+  build-ruby26-rails-52:
     parameters:
       is_main_build:
         type: boolean
@@ -111,13 +115,13 @@ jobs:
     docker:
       - image: cimg/ruby:2.6
         environment:
-          RAILS_VERSION: 5.2.8
+          BUNDLE_GEMFILE: gemfiles/rails_5.2.gemfile
           ENABLE_CODE_COVERAGE: 1
           NO_STEEP: 1
-    working_directory: ~/meta-tags/ruby26-rails-5.2.8
+    working_directory: ~/meta-tags/ruby26-rails-52
     steps: *shared_build_steps
   
-  build-ruby26-rails-6_0_5:
+  build-ruby26-rails-60:
     parameters:
       is_main_build:
         type: boolean
@@ -125,13 +129,13 @@ jobs:
     docker:
       - image: cimg/ruby:2.6
         environment:
-          RAILS_VERSION: 6.0.5
+          BUNDLE_GEMFILE: gemfiles/rails_6.0.gemfile
           ENABLE_CODE_COVERAGE: 1
           NO_STEEP: 1
-    working_directory: ~/meta-tags/ruby26-rails-6.0.5
+    working_directory: ~/meta-tags/ruby26-rails-60
     steps: *shared_build_steps
   
-  build-ruby26-rails-6_1_6:
+  build-ruby26-rails-61:
     parameters:
       is_main_build:
         type: boolean
@@ -139,13 +143,13 @@ jobs:
     docker:
       - image: cimg/ruby:2.6
         environment:
-          RAILS_VERSION: 6.1.6
+          BUNDLE_GEMFILE: gemfiles/rails_6.1.gemfile
           ENABLE_CODE_COVERAGE: 1
           NO_STEEP: 1
-    working_directory: ~/meta-tags/ruby26-rails-6.1.6
+    working_directory: ~/meta-tags/ruby26-rails-61
     steps: *shared_build_steps
   
-  build-ruby27-rails-5_1_7:
+  build-ruby27-rails-51:
     parameters:
       is_main_build:
         type: boolean
@@ -153,13 +157,13 @@ jobs:
     docker:
       - image: cimg/ruby:2.7
         environment:
-          RAILS_VERSION: 5.1.7
+          BUNDLE_GEMFILE: gemfiles/rails_5.1.gemfile
           ENABLE_CODE_COVERAGE: 1
           NO_STEEP: 1
-    working_directory: ~/meta-tags/ruby27-rails-5.1.7
+    working_directory: ~/meta-tags/ruby27-rails-51
     steps: *shared_build_steps
   
-  build-ruby27-rails-5_2_8:
+  build-ruby27-rails-52:
     parameters:
       is_main_build:
         type: boolean
@@ -167,13 +171,13 @@ jobs:
     docker:
       - image: cimg/ruby:2.7
         environment:
-          RAILS_VERSION: 5.2.8
+          BUNDLE_GEMFILE: gemfiles/rails_5.2.gemfile
           ENABLE_CODE_COVERAGE: 1
           NO_STEEP: 1
-    working_directory: ~/meta-tags/ruby27-rails-5.2.8
+    working_directory: ~/meta-tags/ruby27-rails-52
     steps: *shared_build_steps
   
-  build-ruby27-rails-6_0_5:
+  build-ruby27-rails-60:
     parameters:
       is_main_build:
         type: boolean
@@ -181,13 +185,13 @@ jobs:
     docker:
       - image: cimg/ruby:2.7
         environment:
-          RAILS_VERSION: 6.0.5
+          BUNDLE_GEMFILE: gemfiles/rails_6.0.gemfile
           ENABLE_CODE_COVERAGE: 1
           NO_STEEP: 1
-    working_directory: ~/meta-tags/ruby27-rails-6.0.5
+    working_directory: ~/meta-tags/ruby27-rails-60
     steps: *shared_build_steps
   
-  build-ruby27-rails-6_1_6:
+  build-ruby27-rails-61:
     parameters:
       is_main_build:
         type: boolean
@@ -195,13 +199,13 @@ jobs:
     docker:
       - image: cimg/ruby:2.7
         environment:
-          RAILS_VERSION: 6.1.6
+          BUNDLE_GEMFILE: gemfiles/rails_6.1.gemfile
           ENABLE_CODE_COVERAGE: 1
           NO_STEEP: 1
-    working_directory: ~/meta-tags/ruby27-rails-6.1.6
+    working_directory: ~/meta-tags/ruby27-rails-61
     steps: *shared_build_steps
   
-  build-ruby27-rails-7_0_3:
+  build-ruby27-rails-70:
     parameters:
       is_main_build:
         type: boolean
@@ -209,13 +213,41 @@ jobs:
     docker:
       - image: cimg/ruby:2.7
         environment:
-          RAILS_VERSION: 7.0.3
+          BUNDLE_GEMFILE: gemfiles/rails_7.0.gemfile
           ENABLE_CODE_COVERAGE: 1
           NO_STEEP: 1
-    working_directory: ~/meta-tags/ruby27-rails-7.0.3
+    working_directory: ~/meta-tags/ruby27-rails-70
     steps: *shared_build_steps
   
-  build-ruby30-rails-6_0_5:
+  build-ruby27-rails-71:
+    parameters:
+      is_main_build:
+        type: boolean
+        default: false
+    docker:
+      - image: cimg/ruby:2.7
+        environment:
+          BUNDLE_GEMFILE: gemfiles/rails_7.1.gemfile
+          ENABLE_CODE_COVERAGE: 1
+          NO_STEEP: 1
+    working_directory: ~/meta-tags/ruby27-rails-71
+    steps: *shared_build_steps
+  
+  build-ruby30-rails-60:
+    parameters:
+      is_main_build:
+        type: boolean
+        default: false
+    docker:
+      - image: cimg/ruby:3.0
+        environment:
+          BUNDLE_GEMFILE: gemfiles/rails_6.0.gemfile
+          ENABLE_CODE_COVERAGE: 1
+          NO_STEEP: 1
+    working_directory: ~/meta-tags/ruby30-rails-60
+    steps: *shared_build_steps
+  
+  build-ruby30-rails-61:
     parameters:
       is_main_build:
         type: boolean
@@ -223,13 +255,13 @@ jobs:
     docker:
       - image: cimg/ruby:3.0
         environment:
-          RAILS_VERSION: 6.0.5
+          BUNDLE_GEMFILE: gemfiles/rails_6.1.gemfile
           ENABLE_CODE_COVERAGE: 1
           NO_STEEP: 1
-    working_directory: ~/meta-tags/ruby30-rails-6.0.5
+    working_directory: ~/meta-tags/ruby30-rails-61
     steps: *shared_build_steps
   
-  build-ruby30-rails-6_1_6:
+  build-ruby30-rails-70:
     parameters:
       is_main_build:
         type: boolean
@@ -237,13 +269,13 @@ jobs:
     docker:
       - image: cimg/ruby:3.0
         environment:
-          RAILS_VERSION: 6.1.6
+          BUNDLE_GEMFILE: gemfiles/rails_7.0.gemfile
           ENABLE_CODE_COVERAGE: 1
           NO_STEEP: 1
-    working_directory: ~/meta-tags/ruby30-rails-6.1.6
+    working_directory: ~/meta-tags/ruby30-rails-70
     steps: *shared_build_steps
   
-  build-ruby30-rails-7_0_3:
+  build-ruby30-rails-71:
     parameters:
       is_main_build:
         type: boolean
@@ -251,13 +283,13 @@ jobs:
     docker:
       - image: cimg/ruby:3.0
         environment:
-          RAILS_VERSION: 7.0.3
+          BUNDLE_GEMFILE: gemfiles/rails_7.1.gemfile
           ENABLE_CODE_COVERAGE: 1
           NO_STEEP: 1
-    working_directory: ~/meta-tags/ruby30-rails-7.0.3
+    working_directory: ~/meta-tags/ruby30-rails-71
     steps: *shared_build_steps
   
-  build-ruby31-rails-6_0_5:
+  build-ruby31-rails-60:
     parameters:
       is_main_build:
         type: boolean
@@ -265,13 +297,13 @@ jobs:
     docker:
       - image: cimg/ruby:3.1
         environment:
-          RAILS_VERSION: 6.0.5
+          BUNDLE_GEMFILE: gemfiles/rails_6.0.gemfile
           ENABLE_CODE_COVERAGE: 1
           NO_STEEP: 1
-    working_directory: ~/meta-tags/ruby31-rails-6.0.5
+    working_directory: ~/meta-tags/ruby31-rails-60
     steps: *shared_build_steps
   
-  build-ruby31-rails-6_1_6:
+  build-ruby31-rails-61:
     parameters:
       is_main_build:
         type: boolean
@@ -279,13 +311,13 @@ jobs:
     docker:
       - image: cimg/ruby:3.1
         environment:
-          RAILS_VERSION: 6.1.6
+          BUNDLE_GEMFILE: gemfiles/rails_6.1.gemfile
           ENABLE_CODE_COVERAGE: 1
           NO_STEEP: 1
-    working_directory: ~/meta-tags/ruby31-rails-6.1.6
+    working_directory: ~/meta-tags/ruby31-rails-61
     steps: *shared_build_steps
   
-  build-ruby31-rails-7_0_3:
+  build-ruby31-rails-70:
     parameters:
       is_main_build:
         type: boolean
@@ -293,10 +325,24 @@ jobs:
     docker:
       - image: cimg/ruby:3.1
         environment:
-          RAILS_VERSION: 7.0.3
+          BUNDLE_GEMFILE: gemfiles/rails_7.0.gemfile
           ENABLE_CODE_COVERAGE: 1
           NO_STEEP: 0
-    working_directory: ~/meta-tags/ruby31-rails-7.0.3
+    working_directory: ~/meta-tags/ruby31-rails-70
+    steps: *shared_build_steps
+  
+  build-ruby31-rails-71:
+    parameters:
+      is_main_build:
+        type: boolean
+        default: false
+    docker:
+      - image: cimg/ruby:3.1
+        environment:
+          BUNDLE_GEMFILE: gemfiles/rails_7.1.gemfile
+          ENABLE_CODE_COVERAGE: 1
+          NO_STEEP: 1
+    working_directory: ~/meta-tags/ruby31-rails-71
     steps: *shared_build_steps
   
 
@@ -310,7 +356,7 @@ jobs:
       - run:
           name: Uploading Code Coverage
           command: |
-            cd /tmp/workspace/ruby31-rails-7.0.3
+            cd /tmp/workspace/ruby31-rails-70
             ./cc-test-reporter upload-coverage --input coverage/codeclimate.coverage.json || true
   tests:
     docker:
@@ -318,93 +364,108 @@ jobs:
     steps:
       - run:
           name: All tests succeeded
-          command: ':'
+          command: ":"
 
 workflows:
   version: 2
   test:
     jobs:
       
-      - build-ruby26-rails-5_1_7:
+      - build-ruby26-rails-51:
+          is_main_build: false
+      
+      - build-ruby26-rails-52:
+          is_main_build: false
+      
+      - build-ruby26-rails-60:
           is_main_build: false
       
-      - build-ruby26-rails-5_2_8:
+      - build-ruby26-rails-61:
           is_main_build: false
       
-      - build-ruby26-rails-6_0_5:
+      - build-ruby27-rails-51:
           is_main_build: false
       
-      - build-ruby26-rails-6_1_6:
+      - build-ruby27-rails-52:
           is_main_build: false
       
-      - build-ruby27-rails-5_1_7:
+      - build-ruby27-rails-60:
           is_main_build: false
       
-      - build-ruby27-rails-5_2_8:
+      - build-ruby27-rails-61:
           is_main_build: false
       
-      - build-ruby27-rails-6_0_5:
+      - build-ruby27-rails-70:
           is_main_build: false
       
-      - build-ruby27-rails-6_1_6:
+      - build-ruby27-rails-71:
           is_main_build: false
       
-      - build-ruby27-rails-7_0_3:
+      - build-ruby30-rails-60:
           is_main_build: false
       
-      - build-ruby30-rails-6_0_5:
+      - build-ruby30-rails-61:
           is_main_build: false
       
-      - build-ruby30-rails-6_1_6:
+      - build-ruby30-rails-70:
           is_main_build: false
       
-      - build-ruby30-rails-7_0_3:
+      - build-ruby30-rails-71:
           is_main_build: false
       
-      - build-ruby31-rails-6_0_5:
+      - build-ruby31-rails-60:
           is_main_build: false
       
-      - build-ruby31-rails-6_1_6:
+      - build-ruby31-rails-61:
           is_main_build: false
       
-      - build-ruby31-rails-7_0_3:
+      - build-ruby31-rails-70:
           is_main_build: true
       
+      - build-ruby31-rails-71:
+          is_main_build: false
+      
 
       - upload-coverage:
           requires:
-            - build-ruby31-rails-7_0_3
+            - build-ruby31-rails-70
 
       - tests:
           requires:
             
-            - build-ruby26-rails-5_1_7
+            - build-ruby26-rails-51
+            
+            - build-ruby26-rails-52
+            
+            - build-ruby26-rails-60
+            
+            - build-ruby26-rails-61
             
-            - build-ruby26-rails-5_2_8
+            - build-ruby27-rails-51
             
-            - build-ruby26-rails-6_0_5
+            - build-ruby27-rails-52
             
-            - build-ruby26-rails-6_1_6
+            - build-ruby27-rails-60
             
-            - build-ruby27-rails-5_1_7
+            - build-ruby27-rails-61
             
-            - build-ruby27-rails-5_2_8
+            - build-ruby27-rails-70
             
-            - build-ruby27-rails-6_0_5
+            - build-ruby27-rails-71
             
-            - build-ruby27-rails-6_1_6
+            - build-ruby30-rails-60
             
-            - build-ruby27-rails-7_0_3
+            - build-ruby30-rails-61
             
-            - build-ruby30-rails-6_0_5
+            - build-ruby30-rails-70
             
-            - build-ruby30-rails-6_1_6
+            - build-ruby30-rails-71
             
-            - build-ruby30-rails-7_0_3
+            - build-ruby31-rails-60
             
-            - build-ruby31-rails-6_0_5
+            - build-ruby31-rails-61
             
-            - build-ruby31-rails-6_1_6
+            - build-ruby31-rails-70
             
-            - build-ruby31-rails-7_0_3
+            - build-ruby31-rails-71
             
diff --git a/.circleci/config.yml.erb b/.circleci/config.yml.erb
index 6d7b7f0c..0d46305f 100644
--- a/.circleci/config.yml.erb
+++ b/.circleci/config.yml.erb
@@ -3,35 +3,32 @@
 #   rake circleci
 #
 <%
-  rails51 = '5.1.7'
-  rails52 = '5.2.8'
-  rails60 = '6.0.5'
-  rails61 = '6.1.6'
-  rails70 = '7.0.3'
-
   builds = [
     # 2.6
-    ['2.6', rails51],
-    ['2.6', rails52],
-    ['2.6', rails60],
-    ['2.6', rails61],
+    %w[2.6 5.1],
+    %w[2.6 5.2],
+    %w[2.6 6.0],
+    %w[2.6 6.1],
 
     # 2.7
-    ['2.7', rails51],
-    ['2.7', rails52],
-    ['2.7', rails60],
-    ['2.7', rails61],
-    ['2.7', rails70],
+    %w[2.7 5.1],
+    %w[2.7 5.2],
+    %w[2.7 6.0],
+    %w[2.7 6.1],
+    %w[2.7 7.0],
+    %w[2.7 7.1],
 
     # 3.0
-    ['3.0', rails60],
-    ['3.0', rails61],
-    ['3.0', rails70],
+    %w[3.0 6.0],
+    %w[3.0 6.1],
+    %w[3.0 7.0],
+    %w[3.0 7.1],
 
     # 3.1
-    ['3.1', rails60],
-    ['3.1', rails61],
-    ['3.1', rails70, true],
+    %w[3.1 6.0],
+    %w[3.1 6.1],
+    ["3.1", "7.0", true],
+    %w[3.1 7.1],
   ]
 
   main_build = builds.find { |_, _, is_main_build| is_main_build }
@@ -54,26 +51,30 @@ shared_build_steps: &shared_build_steps
   - run:
       name: Storing Rails Version
       command: |
-        echo "$RUBY_VERSION/$RAILS_VERSION" > RAILS_VERSION
-        cat RAILS_VERSION
+        echo "$RUBY_VERSION/$BUNDLE_GEMFILE" > CACHE_ENV_VERSION
+        cat CACHE_ENV_VERSION
+        # To generate cache checksum, we need a static file, but Gemfile is
+        # based on the Rails version we are testing against. This step just puts
+        # a dynamically identified file into a known path.
+        cat "$BUNDLE_GEMFILE" > CACHE_GEMFILE
 
   # Download and cache dependencies
   - restore_cache:
       keys:
-      - dependencies-{{ .Environment.CACHE_VERSION }}-{{ checksum "RAILS_VERSION" }}-{{ checksum "Gemfile" }}-{{ checksum "meta-tags.gemspec" }}
+      - dependencies-{{ .Environment.CACHE_VERSION }}-{{ checksum "CACHE_ENV_VERSION" }}-{{ checksum "CACHE_GEMFILE" }}-{{ checksum "meta-tags.gemspec" }}
       # fallback to using the latest cache if no exact match is found
-      - dependencies-{{ .Environment.CACHE_VERSION }}-{{ checksum "RAILS_VERSION" }}
+      - dependencies-{{ .Environment.CACHE_VERSION }}-{{ checksum "CACHE_ENV_VERSION" }}
 
   - run:
       name: Installing Dependencies
       command: |
-        bundle config set --local path vendor/bundle
+        bundle config set --local path "${PWD}/vendor/bundle"
         bundle check || (bundle install --jobs=4 --retry=3 && bundle clean)
 
   - save_cache:
       paths:
         - ./vendor/bundle
-      key: dependencies-{{ .Environment.CACHE_VERSION }}-{{ checksum "RAILS_VERSION" }}-{{ checksum "Gemfile" }}-{{ checksum "meta-tags.gemspec" }}
+      key: dependencies-{{ .Environment.CACHE_VERSION }}-{{ checksum "CACHE_ENV_VERSION" }}-{{ checksum "CACHE_GEMFILE" }}-{{ checksum "meta-tags.gemspec" }}
 
   # run tests!
   - run:
@@ -122,7 +123,7 @@ shared_build_steps: &shared_build_steps
 
 jobs:
   <% builds.each do |ruby_version, rails_version, is_main_build| %>
-  build-ruby<%= ruby_version.tr('.', '') %>-rails-<%= rails_version.tr('.', '_') %>:
+  build-ruby<%= ruby_version.delete(".") %>-rails-<%= rails_version.delete(".") %>:
     parameters:
       is_main_build:
         type: boolean
@@ -130,10 +131,10 @@ jobs:
     docker:
       - image: cimg/ruby:<%= ruby_version %>
         environment:
-          RAILS_VERSION: <%= rails_version %>
+          BUNDLE_GEMFILE: gemfiles/rails_<%= rails_version %>.gemfile
           ENABLE_CODE_COVERAGE: 1
           NO_STEEP: <%= is_main_build ? 0 : 1  %>
-    working_directory: ~/meta-tags/ruby<%= ruby_version.tr('.', '') %>-rails-<%= rails_version %>
+    working_directory: ~/meta-tags/ruby<%= ruby_version.delete(".") %>-rails-<%= rails_version.delete(".") %>
     steps: *shared_build_steps
   <% end %>
 
@@ -147,7 +148,7 @@ jobs:
       - run:
           name: Uploading Code Coverage
           command: |
-            cd /tmp/workspace/ruby<%= main_build[0].tr('.', '') %>-rails-<%= main_build[1] %>
+            cd /tmp/workspace/ruby<%= main_build[0].delete(".") %>-rails-<%= main_build[1].delete(".") %>
             ./cc-test-reporter upload-coverage --input coverage/codeclimate.coverage.json || true
   tests:
     docker:
@@ -155,23 +156,23 @@ jobs:
     steps:
       - run:
           name: All tests succeeded
-          command: ':'
+          command: ":"
 
 workflows:
   version: 2
   test:
     jobs:
       <% builds.each do |ruby_version, rails_version, is_main_build| %>
-      - build-ruby<%= ruby_version.tr('.', '') %>-rails-<%= rails_version.tr('.', '_') %>:
+      - build-ruby<%= ruby_version.delete(".") %>-rails-<%= rails_version.delete(".") %>:
           is_main_build: <%= !!is_main_build %>
       <% end %>
 
       - upload-coverage:
           requires:
-            - build-ruby<%= main_build[0].tr('.', '') %>-rails-<%= main_build[1].tr('.', '_') %>
+            - build-ruby<%= main_build[0].delete(".") %>-rails-<%= main_build[1].delete(".") %>
 
       - tests:
           requires:
             <% builds.each do |ruby_version, rails_version| %>
-            - build-ruby<%= ruby_version.tr('.', '') %>-rails-<%= rails_version.tr('.', '_') %>
+            - build-ruby<%= ruby_version.delete(".") %>-rails-<%= rails_version.delete(".") %>
             <% end %>
diff --git a/.gitignore b/.gitignore
index 57a96b51..f02c3caf 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,7 @@
 .DS_Store
 .bundle
 Gemfile.lock
+gemfiles/*.gemfile.lock
 .ruby-gemset
 coverage
 doc
@@ -9,4 +10,4 @@ pkg
 *.gem
 .idea
 log/
-tmp/
\ No newline at end of file
+tmp/
diff --git a/Appraisals b/Appraisals
new file mode 100644
index 00000000..e9fffaae
--- /dev/null
+++ b/Appraisals
@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+appraise "rails-5.1" do
+  gem "railties", "5.1.7"
+end
+
+appraise "rails-5.2" do
+  gem "railties", "5.2.8.1"
+end
+
+appraise "rails-6.0" do
+  gem "railties", "6.0.6"
+end
+
+appraise "rails-6.1" do
+  gem "railties", "6.1.7"
+end
+
+appraise "rails-7.0" do
+  gem "railties", "7.0.4"
+end
+
+appraise "rails-7.1" do
+  gem "railties", github: "rails"
+end
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8c59d9a3..54f4ef4d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,8 @@
 
 Changes:
 
-- Switched code style from custom rules to Standard ([246](https://github.com/kpumuk/meta-tags/pull/246)).
+- Switched code style from custom rules to Standard ([246](https://github.com/kpumuk/meta-tags/pull/251)).
+- Switched from testing Rails using environment variables to Appraisal gem ([251](https://github.com/kpumuk/meta-tags/pull/247)).
 
 ## 2.18.0 (September 15, 2022) [☰](https://github.com/kpumuk/meta-tags/compare/v2.17.0...v2.18.0)
 
diff --git a/Gemfile b/Gemfile
index e886d722..6047aa3d 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,17 +2,14 @@
 
 source "https://rubygems.org"
 
-# Specify your gem's dependencies in meta-tags.gemspec
+# Specify gem's dependencies in meta-tags.gemspec
 gemspec
 
-if ENV["RAILS_VERSION"]
-  # Install specified version of actionpack if requested
-  gem "railties", "~> #{ENV["RAILS_VERSION"]}"
-end
+gem "railties", "~> 7.0.4"
 
 unless ENV["NO_STEEP"] == "1"
   # Ruby typings
-  gem "steep", "~> 1.1.1", platform: :mri
+  gem "steep", "~> 1.3.0", platform: :mri
 end
 
 group :test do
diff --git a/gemfiles/rails_5.1.gemfile b/gemfiles/rails_5.1.gemfile
new file mode 100644
index 00000000..0c23c2b9
--- /dev/null
+++ b/gemfiles/rails_5.1.gemfile
@@ -0,0 +1,17 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "railties", "5.1.7"
+gem "steep", "~> 1.3.0", platform: :mri
+
+group :test do
+  gem "standard"
+  gem "rubocop-rails"
+  gem "rubocop-rake"
+  gem "rubocop-rspec", require: false
+  gem "simplecov", "~> 0.21.2"
+  gem "rspec_junit_formatter"
+end
+
+gemspec path: "../"
diff --git a/gemfiles/rails_5.2.gemfile b/gemfiles/rails_5.2.gemfile
new file mode 100644
index 00000000..a0073ba8
--- /dev/null
+++ b/gemfiles/rails_5.2.gemfile
@@ -0,0 +1,17 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "railties", "5.2.8.1"
+gem "steep", "~> 1.3.0", platform: :mri
+
+group :test do
+  gem "standard"
+  gem "rubocop-rails"
+  gem "rubocop-rake"
+  gem "rubocop-rspec", require: false
+  gem "simplecov", "~> 0.21.2"
+  gem "rspec_junit_formatter"
+end
+
+gemspec path: "../"
diff --git a/gemfiles/rails_6.0.gemfile b/gemfiles/rails_6.0.gemfile
new file mode 100644
index 00000000..87730d24
--- /dev/null
+++ b/gemfiles/rails_6.0.gemfile
@@ -0,0 +1,17 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "railties", "6.0.6"
+gem "steep", "~> 1.3.0", platform: :mri
+
+group :test do
+  gem "standard"
+  gem "rubocop-rails"
+  gem "rubocop-rake"
+  gem "rubocop-rspec", require: false
+  gem "simplecov", "~> 0.21.2"
+  gem "rspec_junit_formatter"
+end
+
+gemspec path: "../"
diff --git a/gemfiles/rails_6.1.gemfile b/gemfiles/rails_6.1.gemfile
new file mode 100644
index 00000000..ddeab309
--- /dev/null
+++ b/gemfiles/rails_6.1.gemfile
@@ -0,0 +1,17 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "railties", "6.1.7"
+gem "steep", "~> 1.3.0", platform: :mri
+
+group :test do
+  gem "standard"
+  gem "rubocop-rails"
+  gem "rubocop-rake"
+  gem "rubocop-rspec", require: false
+  gem "simplecov", "~> 0.21.2"
+  gem "rspec_junit_formatter"
+end
+
+gemspec path: "../"
diff --git a/gemfiles/rails_7.0.gemfile b/gemfiles/rails_7.0.gemfile
new file mode 100644
index 00000000..1f8662c4
--- /dev/null
+++ b/gemfiles/rails_7.0.gemfile
@@ -0,0 +1,17 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "railties", "7.0.4"
+gem "steep", "~> 1.3.0", platform: :mri
+
+group :test do
+  gem "standard"
+  gem "rubocop-rails"
+  gem "rubocop-rake"
+  gem "rubocop-rspec", require: false
+  gem "simplecov", "~> 0.21.2"
+  gem "rspec_junit_formatter"
+end
+
+gemspec path: "../"
diff --git a/gemfiles/rails_7.1.gemfile b/gemfiles/rails_7.1.gemfile
new file mode 100644
index 00000000..e93e874a
--- /dev/null
+++ b/gemfiles/rails_7.1.gemfile
@@ -0,0 +1,17 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "railties", github: "rails"
+gem "steep", "~> 1.3.0", platform: :mri
+
+group :test do
+  gem "standard"
+  gem "rubocop-rails"
+  gem "rubocop-rake"
+  gem "rubocop-rspec", require: false
+  gem "simplecov", "~> 0.21.2"
+  gem "rspec_junit_formatter"
+end
+
+gemspec path: "../"
diff --git a/lib/meta_tags/railtie.rb b/lib/meta_tags/railtie.rb
index 05dc6b18..2b27d139 100644
--- a/lib/meta_tags/railtie.rb
+++ b/lib/meta_tags/railtie.rb
@@ -4,13 +4,13 @@ module MetaTags
   class Railtie < Rails::Railtie
     initializer "meta_tags.setup_action_controller" do
       ActiveSupport.on_load :action_controller do
-        ActionController::Base.include MetaTags::ControllerHelper
+        include MetaTags::ControllerHelper
       end
     end
 
     initializer "meta_tags.setup_action_view" do
       ActiveSupport.on_load :action_view do
-        ActionView::Base.include MetaTags::ViewHelper
+        include MetaTags::ViewHelper
       end
     end
   end
diff --git a/meta-tags.gemspec b/meta-tags.gemspec
index 60a85c1f..71b5ba8b 100644
--- a/meta-tags.gemspec
+++ b/meta-tags.gemspec
@@ -26,9 +26,10 @@ Gem::Specification.new do |spec|
 
   spec.add_development_dependency "railties", ">= 3.2.0", "< 7.1"
   spec.add_development_dependency "rake", "~> 13.0"
-  spec.add_development_dependency "rspec", "~> 3.11.0"
+  spec.add_development_dependency "rspec", "~> 3.12.0"
   spec.add_development_dependency "rspec-html-matchers", "~> 0.10.0"
   spec.add_development_dependency "standard", "~> 1.18.1"
+  spec.add_development_dependency "appraisal", "~> 2.4.1"
 
   spec.cert_chain = ["certs/kpumuk.pem"]
   spec.signing_key = File.expand_path("~/.ssh/gem-kpumuk.pem") if $PROGRAM_NAME.end_with?("gem")