diff --git a/.circleci/config.yml b/.circleci/config.yml
index a5cc92e..7f5fb77 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -80,6 +80,16 @@ jobs:
       - setup_remote_docker
       - run: docker-compose run --rm test-rails-6.1
 
+  test_rails_7_0:
+    docker:
+      - image: circleci/buildpack-deps
+    working_directory: ~/project/meta_request
+    steps:
+      - checkout:
+          path: ~/project
+      - setup_remote_docker
+      - run: docker-compose run --rm test-rails-7.0
+
 workflows:
   version: 2
   test_all:
@@ -92,3 +102,4 @@ workflows:
       - test_rails_5_2
       - test_rails_6_0
       - test_rails_6_1
+      - test_rails_7_0
diff --git a/meta_request/Dockerfile-rails-4.2 b/meta_request/Dockerfile-rails-4.2
index c748736..eb35e86 100644
--- a/meta_request/Dockerfile-rails-4.2
+++ b/meta_request/Dockerfile-rails-4.2
@@ -1,8 +1,15 @@
 FROM ruby:2.6-alpine
 
 RUN apk add --update --no-cache \
-     build-base curl-dev git sqlite-dev \
-     yaml-dev zlib-dev nodejs yarn tzdata
+        build-base \
+        curl-dev \
+        git \
+        nodejs \
+        sqlite-dev \
+        tzdata \
+        yaml-dev \
+        yarn \
+        zlib-dev
 
 RUN mkdir /app /gem
 WORKDIR /app
@@ -12,14 +19,10 @@ RUN rails new . --skip-spring
 
 RUN bundle remove sqlite3
 RUN bundle add sqlite3 --version '~> 1.3.6'
-RUN bundle install
 
 COPY . /gem
-
-RUN gem build /gem/meta_request.gemspec
-RUN gem install /gem/meta_request-*.gem
-RUN bundle add meta_request
-RUN bundle install --local
+RUN echo 'gem "meta_request", path: "/gem"' >> Gemfile
+RUN bundle install
 
 COPY res/routes.rb /app/config/
 COPY res/dummy_controller.rb /app/app/controllers/
diff --git a/meta_request/Dockerfile-rails-5.0 b/meta_request/Dockerfile-rails-5.0
index ac498a9..63abdc7 100644
--- a/meta_request/Dockerfile-rails-5.0
+++ b/meta_request/Dockerfile-rails-5.0
@@ -1,25 +1,28 @@
 FROM ruby:2.6-alpine
 
 RUN apk add --update --no-cache \
-     build-base curl-dev git sqlite-dev \
-     yaml-dev zlib-dev nodejs yarn tzdata
+        build-base \
+        curl-dev \
+        git \
+        nodejs \
+        sqlite-dev \
+        tzdata \
+        yaml-dev \
+        yarn \
+        zlib-dev
 
 RUN mkdir /app /gem
 WORKDIR /app
 
+RUN gem update --system
 RUN gem install rails -v 5.0.7.2
 RUN rails new .
 
 RUN bundle remove sqlite3
 RUN bundle add sqlite3 --version '~> 1.3.6'
-RUN bundle install
-
 COPY . /gem
-
-RUN gem build /gem/meta_request.gemspec
-RUN gem install /gem/meta_request-*.gem
-RUN bundle add meta_request
-RUN bundle install --local
+RUN bundle add meta_request --path /gem
+RUN bundle install
 
 COPY res/routes.rb /app/config/
 COPY res/dummy_controller.rb /app/app/controllers/
diff --git a/meta_request/Dockerfile-rails-5.1 b/meta_request/Dockerfile-rails-5.1
index 755b0e5..ac1ec9b 100644
--- a/meta_request/Dockerfile-rails-5.1
+++ b/meta_request/Dockerfile-rails-5.1
@@ -1,23 +1,26 @@
 FROM ruby:2.6-alpine
 
 RUN apk add --update --no-cache \
-     build-base curl-dev git sqlite-dev \
-     yaml-dev zlib-dev nodejs yarn tzdata
+        build-base \
+        curl-dev \
+        git \
+        nodejs \
+        sqlite-dev \
+        tzdata \
+        yaml-dev \
+        yarn \
+        zlib-dev
 
 RUN mkdir /app /gem
 WORKDIR /app
 
+RUN gem update --system
 RUN gem install rails -v 5.1.7
 RUN rails new .
 
-RUN bundle install
-
 COPY . /gem
-
-RUN gem build /gem/meta_request.gemspec
-RUN gem install /gem/meta_request-*.gem
-RUN bundle add meta_request
-RUN bundle install --local
+RUN bundle add meta_request --path /gem
+RUN bundle install
 
 COPY res/routes.rb /app/config/
 COPY res/dummy_controller.rb /app/app/controllers/
diff --git a/meta_request/Dockerfile-rails-5.2 b/meta_request/Dockerfile-rails-5.2
index 49a5b3d..3814ea0 100644
--- a/meta_request/Dockerfile-rails-5.2
+++ b/meta_request/Dockerfile-rails-5.2
@@ -1,23 +1,27 @@
 FROM ruby:2.6-alpine
 
 RUN apk add --update --no-cache \
-     build-base curl-dev git sqlite-dev \
-     yaml-dev zlib-dev nodejs yarn tzdata
+        build-base \
+        curl-dev \
+        git \
+        nodejs \
+        shared-mime-info \
+        sqlite-dev \
+        tzdata \
+        yaml-dev \
+        yarn \
+        zlib-dev
 
 RUN mkdir /app /gem
 WORKDIR /app
 
+RUN gem update --system
 RUN gem install rails -v 5.2.3
 RUN rails new .
 
-RUN bundle install
-
 COPY . /gem
-
-RUN gem build /gem/meta_request.gemspec
-RUN gem install /gem/meta_request-*.gem
-RUN bundle add meta_request
-RUN bundle install --local
+RUN bundle add meta_request --path /gem
+RUN bundle install
 
 COPY res/routes.rb /app/config/
 COPY res/dummy_controller.rb /app/app/controllers/
diff --git a/meta_request/Dockerfile-rails-6.0 b/meta_request/Dockerfile-rails-6.0
index 11809f7..5205b8c 100644
--- a/meta_request/Dockerfile-rails-6.0
+++ b/meta_request/Dockerfile-rails-6.0
@@ -1,23 +1,27 @@
 FROM ruby:2.6-alpine
 
 RUN apk add --update --no-cache \
-     build-base curl-dev git sqlite-dev \
-     yaml-dev zlib-dev nodejs yarn tzdata
+        build-base \
+        curl-dev \
+        git \
+        nodejs \
+        shared-mime-info \
+        sqlite-dev \
+        tzdata \
+        yaml-dev \
+        yarn \
+        zlib-dev
 
 RUN mkdir /app /gem
 WORKDIR /app
 
-RUN gem install rails -v 6.0.0.rc2
+RUN gem update --system
+RUN gem install rails -v 6.0.6
 RUN rails new .
 
-RUN bundle install
-
 COPY . /gem
-
-RUN gem build /gem/meta_request.gemspec
-RUN gem install /gem/meta_request-*.gem
-RUN bundle add meta_request
-RUN bundle install --local
+RUN bundle add meta_request --path /gem
+RUN bundle install
 
 COPY res/routes.rb /app/config/
 COPY res/dummy_controller.rb /app/app/controllers/
@@ -26,6 +30,12 @@ COPY res/meta_request_test.rb /app/test/integration/
 
 RUN bundle exec rails db:migrate
 
+# Webpacker 4 does not work well with Node v16
+RUN bundle remove webpacker
+RUN bundle add webpacker -v 5.4.3
+RUN bundle install
+RUN bundle exec rails webpacker:install
+
 ENV PARALLEL_WORKERS 1
 
 CMD ["bin/rake"]
diff --git a/meta_request/Dockerfile-rails-6.1 b/meta_request/Dockerfile-rails-6.1
index 9f1554e..7475cef 100644
--- a/meta_request/Dockerfile-rails-6.1
+++ b/meta_request/Dockerfile-rails-6.1
@@ -1,23 +1,27 @@
 FROM ruby:2.6-alpine
 
 RUN apk add --update --no-cache \
-     build-base curl-dev git sqlite-dev \
-     yaml-dev zlib-dev nodejs yarn tzdata
+        build-base \
+        curl-dev \
+        git \
+        nodejs \
+        shared-mime-info \
+        sqlite-dev \
+        tzdata \
+        yaml-dev \
+        yarn \
+        zlib-dev
 
 RUN mkdir /app /gem
 WORKDIR /app
 
-RUN gem install rails -v 6.1.0
+RUN gem update --system
+RUN gem install rails -v 6.1.7
 RUN rails new .
 
-RUN bundle install
-
 COPY . /gem
-
-RUN gem build /gem/meta_request.gemspec
-RUN gem install /gem/meta_request-*.gem
-RUN bundle add meta_request
-RUN bundle install --local
+RUN bundle add meta_request --path /gem
+RUN bundle install
 
 COPY res/routes.rb /app/config/
 COPY res/dummy_controller.rb /app/app/controllers/
diff --git a/meta_request/Dockerfile-rails-7.0 b/meta_request/Dockerfile-rails-7.0
new file mode 100644
index 0000000..864d42a
--- /dev/null
+++ b/meta_request/Dockerfile-rails-7.0
@@ -0,0 +1,35 @@
+FROM ruby:3.0-alpine
+
+RUN apk add --update --no-cache \
+        build-base \
+        curl-dev \
+        git \
+        nodejs \
+        shared-mime-info \
+        sqlite-dev \
+        tzdata \
+        yaml-dev \
+        yarn \
+        zlib-dev
+
+RUN mkdir /app /gem
+WORKDIR /app
+
+RUN gem update --system
+RUN gem install rails -v 7.0.4
+RUN rails new .
+
+COPY . /gem
+RUN bundle add meta_request --path /gem
+RUN bundle install
+
+COPY res/routes.rb /app/config/
+COPY res/dummy_controller.rb /app/app/controllers/
+COPY res/dummy /app/app/views/dummy
+COPY res/meta_request_test.rb /app/test/integration/
+
+RUN bundle exec rails db:migrate
+
+ENV PARALLEL_WORKERS 1
+
+CMD ["bin/rake"]
diff --git a/meta_request/docker-compose.yml b/meta_request/docker-compose.yml
index 10bc7cd..5d12dd8 100644
--- a/meta_request/docker-compose.yml
+++ b/meta_request/docker-compose.yml
@@ -29,3 +29,7 @@ services:
     build:
       context: .
       dockerfile: Dockerfile-rails-6.1
+  test-rails-7.0:
+    build:
+      context: .
+      dockerfile: Dockerfile-rails-7.0
diff --git a/meta_request/meta_request.gemspec b/meta_request/meta_request.gemspec
index 298204f..24ba44c 100644
--- a/meta_request/meta_request.gemspec
+++ b/meta_request/meta_request.gemspec
@@ -13,7 +13,7 @@ Gem::Specification.new do |gem|
   gem.license      = 'MIT'
 
   gem.add_dependency 'rack-contrib', '>= 1.1', '< 3'
-  gem.add_dependency 'railties', '>= 3.0.0', '< 7'
+  gem.add_dependency 'railties', '>= 3.0.0', '< 7.1'
   gem.add_development_dependency 'rspec', '~> 3.8.0'
   gem.add_development_dependency 'rubocop', '~> 0.74.0'
 
diff --git a/meta_request/res/meta_request_test.rb b/meta_request/res/meta_request_test.rb
index 9a020e2..6216e62 100644
--- a/meta_request/res/meta_request_test.rb
+++ b/meta_request/res/meta_request_test.rb
@@ -13,7 +13,7 @@ def cleanup
     @request_id = response.headers['X-Request-Id']
   end
 
-  test 'it shold have a request_id header' do
+  test 'it should have a request_id header' do
     assert @request_id
   end