diff --git a/README.md b/README.md
index 1f880e7..3ab9002 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,7 @@ If you have a problem installing extension from Chrome Store or just want to run
 
 ## Supported environments
 
-* Rails 5, 6 and 7
+* Rails 5, 6, 7 and 8
 * Ruby 3
 
 ## Licence
diff --git a/meta_request/Dockerfile-rails-8.0 b/meta_request/Dockerfile-rails-8.0
new file mode 100644
index 0000000..18146fb
--- /dev/null
+++ b/meta_request/Dockerfile-rails-8.0
@@ -0,0 +1,36 @@
+FROM ruby:3.2-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 3.5.7
+RUN bundle config force_ruby_platform true
+RUN gem install rails -v 8.0.0
+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 9ee56d0..305dee0 100644
--- a/meta_request/docker-compose.yml
+++ b/meta_request/docker-compose.yml
@@ -29,3 +29,7 @@ services:
     build:
       context: .
       dockerfile: Dockerfile-rails-7.2
+  test-rails-8.0:
+    build:
+      context: .
+      dockerfile: Dockerfile-rails-8.0
diff --git a/meta_request/meta_request.gemspec b/meta_request/meta_request.gemspec
index 4ab9552..b0b2b74 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', '< 8'
+  gem.add_dependency 'railties', '>= 3.0.0', '< 9'
   gem.add_development_dependency 'rspec', '~> 3.8.0'
   gem.add_development_dependency 'rubocop', '~> 0.74.0'