diff --git a/transport/mongo.py b/transport/mongo.py
index 2fa0f60..e86f1e8 100644
--- a/transport/mongo.py
+++ b/transport/mongo.py
@@ -47,6 +47,8 @@ class Mongo :
         p = self.dbname in self.client.list_database_names() 
         q = self.uid in self.client[self.dbname].list_collection_names()
         return p and q
+    def close(self):
+        self.db.close()
 
 class MongoReader(Mongo,Reader):
     """