diff --git a/requirements.txt b/requirements.txt
index d6341c6..1c7b8e6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -77,7 +77,7 @@ pyparsing==2.4.4
 pyrsistent==0.15.4
 python-dateutil==2.8.0
 pytz==2019.2
-PyYAML==5.1.2
+PyYAML==5.4
 pyzmq==18.1.0
 qtconsole==4.5.5
 requests==2.22.0