diff --git a/tox.ini b/tox.ini
index 57ca48d..4ef3052 100644
--- a/tox.ini
+++ b/tox.ini
@@ -3,4 +3,4 @@ envlist = py24,py25,py26,py27
 
 [testenv]
 commands=nosetests test_tablib.py --with-xunit --xunit-file=nosetests.xml
-deps = nose
\ No newline at end of file
+deps = nose simplejson
\ No newline at end of file