diff --git a/httpbin/helpers.py b/httpbin/helpers.py
index 08ce708..7837390 100644
--- a/httpbin/helpers.py
+++ b/httpbin/helpers.py
@@ -7,8 +7,8 @@ httpbin.helpers
 This module provides helper functions for httpbin.
 """
 
+import json
 import base64
-import simplejson as json
 from hashlib import md5
 from werkzeug.http import parse_authorization_header
 
diff --git a/requirements.txt b/requirements.txt
index 3e453b0..f6be251 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,6 +2,7 @@ Flask==0.10.1
 Jinja2==2.7.2
 MarkupSafe==0.23
 Werkzeug==0.9.4
+decorator==3.4.0
 gevent==1.0.1
 greenlet==0.4.2
 gunicorn==18.0