diff --git a/docker/images/n8n/README.md b/docker/images/n8n/README.md
index be8f178dce..c37f624356 100644
--- a/docker/images/n8n/README.md
+++ b/docker/images/n8n/README.md
@@ -47,9 +47,11 @@ You can then access n8n by opening:
 
 ## Start with tunnel
 
+> **WARNING**: This is only meant for local development and testing. Should not be used in production!
+
 To be able to use webhooks which all triggers of external services like Github
 rely on n8n has to be reachable from the web. To make that easy n8n has a
-special tunnel service which redirects requests from our servers to your local
+special tunnel service (uses this code: [https://github.com/localtunnel/localtunnel](https://github.com/localtunnel/localtunnel)) which redirects requests from our servers to your local
 n8n instance.
 
 To use it simply start n8n with `--tunnel`
diff --git a/packages/cli/README.md b/packages/cli/README.md
index 7525004998..c20d8a63fd 100644
--- a/packages/cli/README.md
+++ b/packages/cli/README.md
@@ -70,9 +70,11 @@ n8n start
 
 ### Start with tunnel
 
+> **WARNING**: This is only meant for local development and testing. Should not be used in production!
+
 To be able to use webhooks which all triggers of external services like Github
 rely on n8n has to be reachable from the web. To make that easy n8n has a
-special tunnel service which redirects requests from our servers to your local
+special tunnel service (uses this code: [https://github.com/localtunnel/localtunnel](https://github.com/localtunnel/localtunnel)) which redirects requests from our servers to your local
 n8n instance.
 
 To use it simply start n8n with `--tunnel`
diff --git a/packages/cli/commands/start.ts b/packages/cli/commands/start.ts
index e7e1dc3757..f673a83297 100644
--- a/packages/cli/commands/start.ts
+++ b/packages/cli/commands/start.ts
@@ -47,7 +47,7 @@ module.exports = (vorpal: Vorpal) => {
 		.option('-o --open',
 			'Opens the UI automatically in browser')
 		.option('--tunnel',
-			'Runs the webhooks via a hooks.n8n.cloud tunnel server')
+			'Runs the webhooks via a hooks.n8n.cloud tunnel server (use only for testing and development)')
 		.option('\n')
 		// 	TODO: Add validation
 		// .validate((args: Args) => {