diff --git a/tekstmelding.py b/tekstmelding.py
index db4baac..4abc472 100644
--- a/tekstmelding.py
+++ b/tekstmelding.py
@@ -1,8 +1,8 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
-from flask import Flask, request, g, abort, jsonify
-from utils import CustomJSONEncoder, generate_activation_code
+from flask import Flask, request, g, abort
+from utils import generate_activation_code
 import MySQLdb
 import MySQLdb.cursors
 import datetime
@@ -13,7 +13,6 @@ import config
 
 app = Flask(__name__)
 app.config.from_object('config')
-app.json_encoder = CustomJSONEncoder
 
 if not app.debug:
     import logging
diff --git a/utils.py b/utils.py
index 61064eb..b455af9 100644
--- a/utils.py
+++ b/utils.py
@@ -1,22 +1,7 @@
-from datetime import date
-from flask.json import JSONEncoder
 import string
 import random
 
 
-class CustomJSONEncoder(JSONEncoder):
-    def default(self, obj):
-        try:
-            if isinstance(obj, date):
-                return obj.isoformat()
-            iterable = iter(obj)
-        except TypeError:
-            pass
-        else:
-            return list(iterable)
-        return JSONEncoder.default(self, obj)
-
-
 def generate_activation_code(length=5):
     chars = string.ascii_lowercase + string.digits
     # remove easily misinterpreted chars