Explicitly reference pytz

dmosorast · dmosorast · commit 6158d8a2e3f3 · 2018-04-10T16:03:58.000-04:00
diff --git a/setup.py b/setup.py
@@ -10,6 +10,7 @@
       classifiers=['Programming Language :: Python :: 3 :: Only'],
       url="http://singer.io",
       install_requires=[
+          'pytz==2018.4',
           'jsonschema==2.6.0',
           'simplejson==3.11.1',
           'python-dateutil>=2.6.0',
