diff --git a/orcid/orcid.py b/orcid/orcid.py
index bdfc486..0f5ccf4 100644
--- a/orcid/orcid.py
+++ b/orcid/orcid.py
@@ -3,14 +3,14 @@
 from jinja2 import FileSystemLoader, Environment
 
 import codecs
-import json
+import simplejson as json
 import os
 import requests
 
 SEARCH_VERSION = "/v1.2"
 VERSION = "/v2.0_rc1"
 
-__version__ = "0.4.0"
+__version__ = "0.4.1"
 
 
 class PublicAPI(object):
diff --git a/orcid/testsuite/test_orcid.py b/orcid/testsuite/test_orcid.py
index 7445b7b..bbe1581 100644
--- a/orcid/testsuite/test_orcid.py
+++ b/orcid/testsuite/test_orcid.py
@@ -1,6 +1,6 @@
 """Tests for ORCID library."""
 
-import json
+import simplejson as json
 import pytest
 import re
 
diff --git a/setup.py b/setup.py
index ecab988..ba3ee4a 100644
--- a/setup.py
+++ b/setup.py
@@ -36,7 +36,7 @@ def run_tests(self):
       ],
       cmdclass={'test': PyTest},
       description='A python wrapper over ORCID API',
-      install_requires=['jinja2', 'requests'],
+      install_requires=['jinja2', 'requests', 'simplejson'],
       keywords=['orcid', 'api', 'wrapper'],
       license='BSD',
       long_description=open('README.rst', 'r').read(),
@@ -45,5 +45,5 @@ def run_tests(self):
       packages=['orcid'],
       tests_require=['pytest', 'coverage', 'httpretty'],
       url='https://github.com/MSusik/python-orcid',
-      version='0.4.0'
+      version='0.4.1'
       )