README.md in circleci-bundle-update-pr-1.8.4 vs README.md in circleci-bundle-update-pr-1.9.0

@@ -31,9 +31,12 @@
 GitHub personal access token is required for sending pull requests to your repository.
 
 1. Go to [your account's settings page](https://github.com/settings/tokens) and generate a personal access token with "repo" scope
 2. On CircleCI dashboard, go to your application's "Project Settings" -> "Environment Variables"
 3. Add an environment variable `GITHUB_ACCESS_TOKEN` with your GitHub personal access token
+    * If use GitHub Enterprise
+        * `ENTERPRISE_OCTOKIT_ACCESS_TOKEN` with your GitHub Enterprise personal access token
+        * `ENTERPRISE_OCTOKIT_API_ENDPOINT` with your GitHub Enterprise api endpoint (e.g. https://www.example.com/api/v3)
 
 ### Configure circle.yml
 
 Configure your `circle.yml` or `.circleci/config.yml` to run `circleci-bundle-update-pr`, for example: