diff --git a/requirements.txt b/requirements.txt
index 5413950..c6b0168 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -65,7 +65,7 @@ pyparsing==2.4.2
 pyrsistent==0.15.4
 pytest==5.2.1
 python-dateutil==2.8.0
-PyYAML==5.1.2
+PyYAML==5.4
 pyzmq==18.1.0
 qtconsole==4.5.5
 ray==0.7.5