diff --git a/requirements.txt b/requirements.txt
index c53d37aa..28feb8c1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,6 +8,7 @@ six>=1.7.0
 Babel>=1.3
 oauthlib
 netifaces
+pytz
 PyYAML
 requests
 untangle==1.2.1