diff --git a/requirements/common.txt b/requirements/common.txt
index 16fbac6810..01b546f758 100644
--- a/requirements/common.txt
+++ b/requirements/common.txt
@@ -19,6 +19,7 @@ PyYAML==3.10
 pbs==0.105
 pdfminer==20110227
 psutil==0.5.1
+pytz==2014.4
 python-gnupg==0.3.6
 python-hkp==0.1.3
 python-magic==0.4.6