diff --git a/requirements/base.txt b/requirements/base.txt
index 850ec64..89ba34f 100644
--- a/requirements/base.txt
+++ b/requirements/base.txt
@@ -1,9 +1,9 @@
 amqp==1.4.9
 bpython==0.15.0
-billiard==3.3.0.22
-celery==3.1.20
-kombu==3.0.33
-pytz==2015.7
-PyYAML==3.11
+billiard==3.3.0.23
+celery==3.1.26.post2
+kombu==3.0.37
+pytz==2019.2
+PyYAML==3.13
 -e git+https://git.dittberner.info/gnuviech/gvacommon.git@0.3.0#egg=gvacommon
 redis==2.10.5