diff --git a/requirements.txt b/requirements.txt
index 9af6372..cdb57d5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -56,7 +56,7 @@ pyparsing==2.4.5
 pyrsistent==0.15.5
 python-dateutil==2.8.1
 pytz==2019.3
-PyYAML==5.1.2
+PyYAML==5.4
 pyzmq==18.1.1
 qtconsole==4.6.0
 requests==2.22.0