diff --git a/setup.py b/setup.py
index 8daa2bd..f194326 100644
--- a/setup.py
+++ b/setup.py
@@ -16,7 +16,7 @@
     install_requires=[
         'nydus>=0.10.6',
         'redis>=2.7.2',
-        'python-dateutil==1.5',
+        'python-dateutil>=1.5, !=2.0',
     ],
     tests_require=[
         'nose>=1.0',