diff --git a/setup.py b/setup.py
index d195a173..b92a58cb 100644
--- a/setup.py
+++ b/setup.py
@@ -33,7 +33,8 @@
               'js2py.constructors', 'js2py.host', 'js2py.es6', 'js2py.internals',
               'js2py.internals.prototypes', 'js2py.internals.constructors', 'js2py.py_node_modules'],
     url='https://github.com/PiotrDabkowski/Js2Py',
-    install_requires = ['tzlocal>=1.2', 'six>=1.10', 'pyjsparser>=2.5.1'],
+    install_requires = ['six>=1.10', 'pyjsparser>=2.5.1'],
+    extras_require ={"localzone": ['tzlocal>=1.2']},
     license='MIT',
     author='Piotr Dabkowski',
     author_email='piodrus@gmail.com',