diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 07d08be..2e20365 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -1,6 +1,9 @@
 name: Ruby
 
-on: [push, pull_request]
+on:
+  push:
+    branches: [main]
+  pull_request:
 
 jobs:
   build:
diff --git a/Gemfile b/Gemfile
index d310548..f404e65 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,6 +8,8 @@ gem 'appraisal'
 gem 'irb'
 gem 'mail'
 gem 'net-smtp'
+gem 'rack'
+gem 'rackup'
 gem 'rake', '~> 13.3'
 gem 'rdoc', '~> 7.1.0'
 gem 'rspec', '~> 3'
@@ -17,4 +19,5 @@ gem 'rubocop-rake', require: false
 gem 'rubocop-rspec', require: false
 gem 'vcr'
 gem 'webmock'
+gem 'webrick'
 gem 'yard', '~> 0.9'
diff --git a/Gemfile.lock b/Gemfile.lock
index 9ff559e..915d212 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -61,6 +61,9 @@ GEM
       stringio
     public_suffix (7.0.2)
     racc (1.8.1)
+    rack (3.2.4)
+    rackup (2.3.1)
+      rack (>= 3)
     rainbow (3.1.1)
     rake (13.3.1)
     rdoc (7.1.0)
@@ -120,6 +123,7 @@ GEM
       addressable (>= 2.8.0)
       crack (>= 0.3.2)
       hashdiff (>= 0.4.0, < 2.0.0)
+    webrick (1.9.2)
     yard (0.9.38)
 
 PLATFORMS
@@ -131,6 +135,8 @@ DEPENDENCIES
   mail
   mailtrap!
   net-smtp
+  rack
+  rackup
   rake (~> 13.3)
   rdoc (~> 7.1.0)
   rspec (~> 3)
@@ -140,6 +146,7 @@ DEPENDENCIES
   rubocop-rspec
   vcr
   webmock
+  webrick
   yard (~> 0.9)
 
 BUNDLED WITH
diff --git a/README.md b/README.md
index 01e7b05..b92b8c1 100644
--- a/README.md
+++ b/README.md
@@ -204,15 +204,24 @@ Bug reports and pull requests are welcome on [GitHub](https://github.com/railswa
 
 ## Development
 
-After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake spec` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.
+After checking out the repo, run `bin/setup` to install dependencies. Then, run
+`rake spec` to run the tests. You can also run `bin/console` for an interactive 
+prompt that will allow you to experiment.
 
 To install this gem onto your local machine, run `bundle exec rake install`.
 
-To release a new version, update the version number in `version.rb`, and then run `bundle exec rake release`, which will create a git tag for the version, push git commits and the created tag, and push the `.gem` file to [rubygems.org](https://rubygems.org).
+To release a new version, update the version number in `version.rb`, and then
+run `bundle exec rake release`, which will create a git tag for the version,
+push git commits and the created tag, and push the `.gem` file to 
+[rubygems.org](https://rubygems.org).
+
+To run the documentation server, first generate the documentation with
+`yard doc`, then run `yard server`.
 
 All contributions are required to have rspec tests covering its functionality.
 
-Please be sure to update [README](README.md) with new examples and features when applicable.
+Please be sure to update [README](README.md) with new examples and features
+when applicable.
 
 ## License
 
@@ -224,4 +233,4 @@ Everyone interacting in the Mailtrap project's codebases, issue trackers, chat r
 
 ## Compatibility with previous releases
 
-Versions of this package up to 2.0.2 were an [unofficial client](https://github.com/vchin/mailtrap-client) developed by [@vchin](https://github.com/vchin). Package version 3 is a completely new package. 
\ No newline at end of file
+Versions of this package up to 2.0.2 were an [unofficial client](https://github.com/vchin/mailtrap-client) developed by [@vchin](https://github.com/vchin). Package version 3 is a completely new package.