diff --git a/.env.example b/.env.example
index d6b68ce..4283762 100644
--- a/.env.example
+++ b/.env.example
@@ -14,7 +14,7 @@ CAST_API_URL=https://api.cast.ph
 CAST_SENDER_ID=
 
 # MongoDB
-MONGO_URI=mongodb://localhost:27017/cast-ghl
+MONGO_URI=mongodb://mongo:27017/cast-ghl
 
 # Inbound (Phase 2)
 INBOUND_API_KEY=