diff --git a/robotoff/settings.py b/robotoff/settings.py
index 38c9750ffb..04ee733d09 100644
--- a/robotoff/settings.py
+++ b/robotoff/settings.py
@@ -52,7 +52,7 @@
 DB_PASSWORD = os.environ.get("DB_PASSWORD", "postgres")
 DB_HOST = os.environ.get("DB_HOST", "localhost")
 
-MONGO_URI = "mongodb://localhost:27017"
+MONGO_URI = os.environ.get("MONGO_URI", "mongodb://localhost:27017")
 
 IPC_AUTHKEY = os.environ.get("IPC_AUTHKEY", "IPC").encode("utf-8")
 IPC_HOST = os.environ.get("IPC_HOST", "localhost")