diff --git a/requirements.txt b/requirements.txt
index 94347b2..d51458b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -78,7 +78,7 @@ pyparsing==2.3.1
 pytest==4.1.1
 python-apt==1.1.0b1+ubuntu0.16.4.2
 python-dateutil==2.7.5
-PyYAML==3.13
+PyYAML==5.4
 pyzmq==17.1.2
 qtconsole==4.4.3
 ray==0.6.2