diff --git a/setup.py b/setup.py
index 3397661..a9c558f 100644
--- a/setup.py
+++ b/setup.py
@@ -31,6 +31,6 @@ setup(
     description='Etherdump an etherpad publishing & archiving system',
     # long_description=open('README.md').read(),
     install_requires=[
-         "html5lib", "jinja2"
+         "html5lib", "jinja2", "python-dateutil"
     ]
 )