diff --git a/setup.py b/setup.py
index 4b74a30e..d0476511 100644
--- a/setup.py
+++ b/setup.py
@@ -57,7 +57,7 @@ setup(
         'six>=1.10.0',
         'graphql-core>=0.4.9',
         'graphql-relay==0.3.3',
-        'iso8601==0.1.11',
+        'iso8601',
     ],
     tests_require=[
         'django-filter>=0.10.0',