diff --git a/README.md b/README.md
index 92b6bdc..cd66276 100644
--- a/README.md
+++ b/README.md
@@ -28,8 +28,15 @@ To build:
 
     ```
     $ cd public
+    ```
+    For *python2*, run:
+    ```
     $ python -m SimpleHTTPServer
     ```
+    For *python3*, run:
+    ```
+    $ python -m http.server
+    ```
 
 1. You'll need to be connected over HTTPS to access sensors (at least on iPhone), use ngrok to open up your web browser to the world via: