diff --git a/variants/station_g3_esp32/platformio.ini b/variants/station_g3_esp32/platformio.ini
index 38cb2fec..039a12cb 100644
--- a/variants/station_g3_esp32/platformio.ini
+++ b/variants/station_g3_esp32/platformio.ini
@@ -175,6 +175,7 @@ build_flags =
   -D ADMIN_PASSWORD='"password"'
   -D MAX_NEIGHBOURS=50
   -D WITH_MQTT_BRIDGE=1
+  -D OTA_MANIFEST_BASE='"https://observer.gessaman.com/v"'
   -D MAX_MQTT_BROKERS=3
   -D MQTT_MAX_PACKET_SIZE=1024
   -D MQTT_DEBUG=1
@@ -222,6 +223,7 @@ build_flags =
   -D ADMIN_PASSWORD='"password"'
   -D ROOM_PASSWORD='"hello"'
   -D WITH_MQTT_BRIDGE=1
+  -D OTA_MANIFEST_BASE='"https://observer.gessaman.com/v"'
   -D MAX_NEIGHBOURS=50
   -D MAX_MQTT_BROKERS=3
   -D MQTT_MAX_PACKET_SIZE=1024