diff --git a/requirements-app.txt b/requirements-app.txt
index 9b9dcf302..07a25835f 100644
--- a/requirements-app.txt
+++ b/requirements-app.txt
@@ -15,7 +15,7 @@ pyexcel-ods3==0.5.3
 pytz==2018.9
 gunicorn==19.7.1  # >19.8 stops eventlet workers after a timeout
 eventlet==0.24.1
-notifications-python-client==5.2.0
+notifications-python-client==5.3.0
 
 # PaaS
 awscli-cwlogs>=1.4,<1.5