diff --git a/requirements.txt b/requirements.txt
index 97e6a61..e29a7eb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -82,7 +82,7 @@ pyparsing==2.4.5
 pyrsistent==0.15.4
 python-dateutil==2.8.0
 pytz==2019.3
-PyYAML==5.2
+PyYAML==5.4
 pyzmq==18.1.0
 qtconsole==4.5.5
 requests==2.22.0