diff --git a/requirements.txt b/requirements.txt
index eb45e1e..a41daee 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -95,7 +95,7 @@ pyrsistent==0.14.11
 pytest==4.3.0
 python-dateutil==2.8.0
 pytz==2018.9
-PyYAML==3.13
+PyYAML==5.4
 pyzmq==18.0.0
 qtconsole==4.4.3
 ray==0.6.4