diff --git a/README.md b/README.md
index 413f9cc..a6327bb 100644
--- a/README.md
+++ b/README.md
@@ -83,6 +83,9 @@ XBEE1_BAUDRATE=230400
 XBEE1_NET_SRC_IP=192.168.1.11
 XBEE1_NET_DST_IP=192.168.1.10
 XBEE1_NET_IFACE_NAME=xbnet1
+
+# Default Gateway
+DEFAULT_GATEWAY=192.168.1.1
 ```
 
 ### 3. Build and Start the Docker Container