diff --git a/README.md b/README.md
index 08926d8..4e3383c 100644
--- a/README.md
+++ b/README.md
@@ -13,6 +13,10 @@ __[Voice](https://developer.ringcentral.com/api-products/voice), [SMS/MMS](https
 
 This SDK is tested against Python 3.7 so we recommend [installing using it with Python 3.7 or newer](https://www.python.org/downloads/)
 
+# dev-notes 
+
+https://github.com/ringcentral/ringcentral-python/blob/master/dev-notes.md
+
 ## Manual
 
 ```sh
diff --git a/demo.py b/ringcentral/demos/demo.py
similarity index 100%
rename from demo.py
rename to ringcentral/demos/demo.py
diff --git a/demo_cache.py b/ringcentral/demos/demo_cache.py
similarity index 100%
rename from demo_cache.py
rename to ringcentral/demos/demo_cache.py
diff --git a/ringcentral/demo_fax.py b/ringcentral/demos/demo_fax.py
similarity index 100%
rename from ringcentral/demo_fax.py
rename to ringcentral/demos/demo_fax.py
diff --git a/demo_mms.py b/ringcentral/demos/demo_mms.py
similarity index 100%
rename from demo_mms.py
rename to ringcentral/demos/demo_mms.py
diff --git a/demo_multipart_mixed.py b/ringcentral/demos/demo_multipart_mixed.py
similarity index 100%
rename from demo_multipart_mixed.py
rename to ringcentral/demos/demo_multipart_mixed.py
diff --git a/demo_sms.py b/ringcentral/demos/demo_sms.py
similarity index 100%
rename from demo_sms.py
rename to ringcentral/demos/demo_sms.py
diff --git a/demo_subscription.py b/ringcentral/demos/demo_subscription.py
similarity index 100%
rename from demo_subscription.py
rename to ringcentral/demos/demo_subscription.py
diff --git a/demo_web_socket.py b/ringcentral/demos/demo_web_socket.py
similarity index 100%
rename from demo_web_socket.py
rename to ringcentral/demos/demo_web_socket.py