README.md in env_pull_request-0.2.1 vs README.md in env_pull_request-0.2.2

- old
+ new

@@ -22,13 +22,15 @@
 ## Supported services / applications
 
 * Travis-ci
     * `ENV['TRAVIS_PULL_REQUEST']`
     * [Environment Variables - Travis CI](http://docs.travis-ci.com/user/environment-variables/#Convenience-Variables)
-
 * CircleCI
     * `ENV['CIRCLE_PR_NUMBER']`
     * [Environment variables - CircleCI](https://circleci.com/docs/environment-variables#building-pull-requests-that-come-from-forks)
+* Jenkins GitHub pull request builder plugin
+    * `ENV['ghprbPullId']`
+    * [GitHub pull request builder plugin - Jenkins - Jenkins Wiki](https://wiki.jenkins-ci.org/display/JENKINS/GitHub+pull+request+builder+plugin#GitHubpullrequestbuilderplugin-EnvironmentVariables)
 
 
 ## Changelog
 
 [changelog.md](./changelog.md).