diff --git a/requirements.txt b/requirements.txt
index 857a4a9..875aec7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -67,7 +67,7 @@ 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==4.5.5
 requests==2.22.0