diff --git a/README.md b/README.md
index ffc29b8..b077e92 100644
--- a/README.md
+++ b/README.md
@@ -109,6 +109,8 @@ MESH_HIDE_DESTINATION_DATA=false
 FILTERED_PORTS=0
 ## Hide message content in the TEXT_MESSAGE_APP packets (default: true) (Currently we only log message length, if we hide then all messages would have the same length)
 HIDE_MESSAGE=false
+## MQTT server Key for decoding messages
+MQTT_SERVER_KEY=1PG7OiApB1nwvP+rz05pAQ==
 ```
 
 ## Running the Project
@@ -129,4 +131,4 @@ allows you to start creating and customizing your dashboards right away.
 
 ## Contributing
 
-Contributions are welcome! Please open an issue or submit a pull request on GitHub.
\ No newline at end of file
+Contributions are welcome! Please open an issue or submit a pull request on GitHub.