diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index bd866e0..a7acce2
--- a/requirements.txt
+++ b/requirements.txt
@@ -80,7 +80,7 @@ pytest==3.6.1
 python-dateutil==2.7.3
 python-utils==2.3.0
 pytz==2018.4
-PyYAML==3.12
+PyYAML==5.4
 pyzmq==17.0.0
 qtconsole==4.3.1
 ray==0.4.0