diff --git a/.env_example b/.env_example
index 69f6742..67c84e5 100644
--- a/.env_example
+++ b/.env_example
@@ -9,3 +9,4 @@ MATRIX_HOMESERVER_ADDRESS =
 MATRIX_USER_ID = 
 MATRIX_USER_PASSWORD = 
 MATRIX_ROOM_ID = 
+MATRIX_DEVICE_ID =