diff --git a/README.rst b/README.rst
index eed8218..19b458b 100644
--- a/README.rst
+++ b/README.rst
@@ -27,30 +27,33 @@ direct usage
 .. code-block:: python
 
   import asyncio
-  from aiosocks import (
-    Socks4Addr, Socks5Addr, Socks4Auth, Socks5Auth, create_connection
-  )
-  
+  import aiosocks
+
+
   async def connect():
-    socks5_addr = Socks5Addr('127.0.0.1', 1080)
-    socks4_addr = Socks4Addr('127.0.0.1', 1080)
+    socks5_addr = aiosocks.Socks5Addr('127.0.0.1', 1080)
+    socks4_addr = aiosocks.Socks4Addr('127.0.0.1', 1080)
     
-    socks5_auth = Socks5Auth('login', 'pwd')
-    socks4_auth = Socks4Auth('ident')
+    socks5_auth = aiosocks.Socks5Auth('login', 'pwd')
+    socks4_auth = aiosocks.Socks4Auth('ident')
   
     dst = ('github.com', 80)
     
     # socks5 connect
-    transport, protocol = await create_connection(
+    transport, protocol = await aiosocks.create_connection(
         lambda: Protocol, proxy=socks5_addr, proxy_auth=socks5_auth, dst=dst)
     
     # socks4 connect
-    transport, protocol = await create_connection(
+    transport, protocol = await aiosocks.create_connection(
         lambda: Protocol, proxy=socks4_addr, proxy_auth=socks4_auth, dst=dst)
         
     # socks4 without auth and local domain name resolving
-    transport, protocol = await create_connection(
+    transport, protocol = await aiosocks.create_connection(
         lambda: Protocol, proxy=socks4_addr, proxy_auth=None, dst=dst, remote_resolve=False)
+
+    # use socks protocol
+    transport, protocol = await aiosocks.create_connection(
+        None, proxy=socks4_addr, proxy_auth=None, dst=dst)
   
   
   if __name__ == '__main__':
@@ -58,6 +61,25 @@ direct usage
     loop.run_until_complete(connect())
     loop.close()
 
+error handling
+^^^^^^^^^^^^^^
+
+.. code-block:: python
+
+    try:
+      transport, protocol = await aiosocks.create_connection(
+          lambda: Protocol, proxy=socks5_addr, proxy_auth=socks5_auth, dst=dst)
+    except aiosocks.SocksConnectionError:
+      # connection error
+    except aiosocks.LoginAuthenticationFailed:
+      # auth failed
+    except aiosocks.NoAcceptableAuthMethods:
+      # All offered SOCKS5 authentication methods were rejected
+    except (aiosocks.InvalidServerVersion, aiosocks.InvalidServerReply):
+      # something wrong
+    except aiosocks.SocksError:
+      # something other
+
 aiohttp usage
 ^^^^^^^^^^^^^
 
@@ -65,19 +87,29 @@ aiohttp usage
 
   import asyncio
   import aiohttp
-  from aiosocks import Socks5Addr, Socks5Auth
+  import aiosocks
   from aiosocks.connector import SocksConnector
-  
+
+
   async def load_github_main():
-    addr = Socks5Addr('127.0.0.1', 1080)
-    auth = Socks5Auth('proxyuser1', password='pwd')
-    
+    addr = aiosocks.Socks5Addr('127.0.0.1', 1080)
+    auth = aiosocks.Socks5Auth('proxyuser1', password='pwd')
+
+    # remote resolve
+    # conn = SocksConnector(proxy=addr, proxy_auth=auth, remote_resolve=True)
+
+    # or locale resolve
     conn = SocksConnector(proxy=addr, proxy_auth=auth, remote_resolve=False)
-    
-    with aiohttp.ClientSession(connector=conn) as ses:
-      async with session.get('http://github.com/') as resp:
-        if resp.status == 200:
-          print(await resp.text())
+
+    try:
+      with aiohttp.ClientSession(connector=conn) as ses:
+        async with session.get('http://github.com/') as resp:
+          if resp.status == 200:
+            print(await resp.text())
+    except aiohttp.ProxyConnectionError:
+      # connection problem
+    except aiosocks.SocksError:
+      # communication problem
   
   
   if __name__ == '__main__':