diff --git a/MVMCore/MVMCore/Models/JSON/JSONHelper.swift b/MVMCore/MVMCore/Models/JSON/JSONHelper.swift
index 76c8c53..d5843cb 100644
--- a/MVMCore/MVMCore/Models/JSON/JSONHelper.swift
+++ b/MVMCore/MVMCore/Models/JSON/JSONHelper.swift
@@ -78,6 +78,7 @@ extension JSONDictionary  {
             characterSet.remove(":")
             characterSet.remove("?")
             characterSet.remove("=")
+            characterSet.remove("&")
             let queryItem = URLQueryItem(name: key, value: valueString.addingPercentEncoding(withAllowedCharacters: characterSet) ?? valueString)
             queryItems.append(queryItem)
         }