diff --git a/src/utilities/SimpleMongoWrapper.js b/src/utilities/SimpleMongoWrapper.js
index b254f64..20202a7 100644
--- a/src/utilities/SimpleMongoWrapper.js
+++ b/src/utilities/SimpleMongoWrapper.js
@@ -24,7 +24,7 @@ class MongoDB {
     }
 
     URI(database) {
-        return `mongodb://${this._auth}${this.config.host}/${database}?authSource=${database}`;
+        return `mongodb://${this._auth}${this.config.host}/${database}${this._auth.length ? `?authSource=${database}` : ''}`;
     }
 
     async init() {