diff --git a/requirements.txt b/requirements.txt
index c9fff9d..9b28988 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,4 +2,5 @@ pytz>=2016.6.1
 luigi>=2.2.0
 pyquery>=1.2.9
 requests>=2.9.1
-pymongo>=3.2
\ No newline at end of file
+pymongo>=3.2
+dateutil>=2.4.2
\ No newline at end of file
diff --git a/setup.py b/setup.py
index 3c6a0ab..e7b9507 100644
--- a/setup.py
+++ b/setup.py
@@ -14,6 +14,7 @@ setup(
         'six >= 1.10.0',
         'pymongo >= 3.2',
         'pytz >= 2016.6.1',
+        'dateutil >= 2.4.2'
     ],
     setup_requires=[
         'pytest_runner'