diff --git a/requirements/common.txt b/requirements/common.txt
index 1fee359668..dd6a1d6b2b 100644
--- a/requirements/common.txt
+++ b/requirements/common.txt
@@ -1,4 +1,4 @@
-celery==3.1.17
+celery==3.1.18
 cssmin==0.2.0
 
 Django==1.6.11
@@ -22,7 +22,7 @@ Pillow==2.6.1
 pdfminer==20110227
 psutil==2.1.3
 pycountry==1.8
-pytz==2014.4
+pytz==2015.4
 python-dateutil==2.4.0
 python-gnupg==0.3.7
 python-hkp==0.1.3