diff --git a/server/src/lib/storage/mongo/MongoCollection.ts b/server/src/lib/storage/mongo/MongoCollection.ts
index 3d6a65e9..f23f75ba 100644
--- a/server/src/lib/storage/mongo/MongoCollection.ts
+++ b/server/src/lib/storage/mongo/MongoCollection.ts
@@ -43,7 +43,7 @@ export class MongoCollection implements ICollection {
       .then((collection) => collection.insert(document));
   }
 
-  count(query: any): Bluebird<number> {
+  count(query: any): Bluebird<any> {
     return this.collection()
       .then((collection) => collection.count(query));
   }