diff --git a/README.md b/README.md
index 56a716a..da2a0b8 100644
--- a/README.md
+++ b/README.md
@@ -17,25 +17,30 @@ Target Device :
 
 in [user manual](https://www.peak-system.com/produktcd/Pdf/English/PCAN-Ethernet-Gateway-FD-DR_UserMan_eng.pdf), custom gateway protocol is presented.
 
-in Route Configuration Page, add Routing IP Addresses both side(CAN->Ethernet, Ethernet->CAN)
+### Handshake Off
+you must **disable handshake** for custom protocol integration.
 
+- enter "Expert Mode" in admin page
+- turn Handshake Checkbox off
+
+### Router Configuration
+in Route Configuration Page, add Routing IP Addresses both side
+- CAN->Ethernet
+- Ethernet->CAN
 
-<br>
 
 ## Install Plugin Package
 
+install from PyPI
 ```shell
-
-# install from PyPI
 $ pip3 install pcan-gatewaybus
+```
 
-or 
-
-# local installation
+local installation
+```shell
 $ git clone https://github.com/ys-oh/python-can-gatewaybus
 $ cd python-can-gatewaybus
 $ pip3 install . 
-
 ```
 
 
diff --git a/gateway/gateway.py b/gateway/gateway.py
index 86d3b3c..6df0b3d 100644
--- a/gateway/gateway.py
+++ b/gateway/gateway.py
@@ -157,7 +157,7 @@ def get_binary(self):
     def __get_canid(self):
         arbitration_id = self.can_id & 0x3FFFFFFF
         rtr = (1 << 29) if self.remote and not self.fd else 0
-        extid = (2 << 29) if self.extend_id else 0
+        extid = (1 << 30) if self.extend_id else 0
         return arbitration_id | rtr | extid
 
     def __get_channel_idx(self):
diff --git a/setup.py b/setup.py
index 3de1c1f..818b16c 100644
--- a/setup.py
+++ b/setup.py
@@ -7,7 +7,7 @@
 
 setuptools.setup(
     name="pcan-gatewaybus",
-    version="0.0.2",
+    version="0.0.3",
     author="yunsik oh",
     author_email="oyster90@naver.com",
     description="pcan gatewaybus backend for \"python-can\"",