diff --git a/README.md b/README.md
index 4378fd8..eb9e3e1 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,7 @@ ColabCode also has a command-line script. So you can just run `colabcode` from c
 `colabcode -h` will give the following:
 
 ```
-usage: colabcode [-h] --port PORT [--password PASSWORD] [--mount_drive]
+usage: colabcode [-h] --port PORT [--password PASSWORD] [--mount_drive] [--option OPTION]
 
 ColabCode: Run VS Code On Colab / Kaggle Notebooks
 
@@ -33,6 +33,7 @@ required arguments:
 optional arguments:
   --password PASSWORD  password to protect your code-server from unauthorized access
   --mount_drive        if you use --mount_drive, your google drive will be mounted
+  --option             choose between "localtunnel" and "ngrok" for tunneling services
 ```
 
 Else, you can do the following:
@@ -50,8 +51,9 @@ $ ColabCode()
 # - port: the port you want to run code-server on, default 10000
 # - password: password to protect your code server from being accessed by someone else. Note that there is no password by default!
 # - mount_drive: True or False to mount your Google Drive
+# - option: "localtunnel" or "ngrok" to use respective tunneling services
 
-$ ColabCode(port=10000, password="abhishek", mount_drive=True)
+$ ColabCode(port=10000, password="abhishek", mount_drive=True, option="localtunnel")
 ```
 ## How to use it?
 Colab starter notebook: [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/abhishekkrthakur/colabcode/blob/master/colab_starter.ipynb)