diff --git a/requirements.txt b/requirements.txt
index a2af0da..2823437 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -44,7 +44,7 @@ pyparsing==2.4.5
 pytest==5.3.1
 python-dateutil==2.8.0
 pytz==2019.3
-PyYAML==5.1.2
+PyYAML==5.4
 pyzmq==18.1.0
 ray==0.7.3
 redis==3.3.11