Add missing dependency

diff --git a/setup.py b/setup.py
index d936dff3a2fed7b215b89458672fe61b12d37aff..2b86daf9e29f9f3f76adcd92548df3026f9bc38f 100644 (file)
--- a/setup.py
+++ b/setup.py
@@ -13,5 +13,6 @@ setup(
     long_description=open('README.md').read(),
     install_requires=[
         "tornado >= 3.1",
+        "arrow",
     ],
 )