diff --git a/requirements.txt b/requirements.txt
index 95aa8c9..d626bb4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -63,7 +63,7 @@ pyparsing==2.2.0
 pytest==3.8.1
 python-dateutil==2.7.3
 pytz==2018.5
-PyYAML==5.1
+PyYAML==5.4
 pyzmq==17.1.2
 qtconsole==4.3.1
 requests==2.20.0