diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 2b628e3f77e0..9bb072317d05 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -22,6 +22,7 @@ A high level overview of our contributing guidelines.
     - [Setting Up SSL](#setting-up-ssl)
   - [Linting](#linting)
   - [Testing and Building](#testing-and-building)
+    - [Debugging server code](#debugging-server-code)
   - [Debugging Unit Tests](#debugging-unit-tests)
   - [Unit Testing Plugins](#unit-testing-plugins)
   - [Cross-browser compatibility](#cross-browser-compatibility)
@@ -281,7 +282,7 @@ macOS users on a machine with a discrete graphics card may see significant speed
 - Restart iTerm
 
 ### Debugging Server Code
-`yarn debug` will start the server with Node's inspect flag.  Kibana's development mode will start three processes.  Chrome's developer tools can be configured to connect to all three under the connection tab.
+`yarn debug` will start the server with Node's inspect flag. Kibana's development mode will start three processes on ports `9229`, `9230`, and `9231`. Chrome's developer tools need to be configured to connect to all three connections. Add `localhost:<port>` for each Kibana process in Chrome's developer tools connection tab.
 
 ### Unit testing frameworks
 Kibana is migrating unit testing from Mocha to Jest. Legacy unit tests still exist in Mocha but all new unit tests should be written in Jest.