diff --git a/requirements.txt b/requirements.txt
index a7afffa..a5f8fdc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -56,7 +56,7 @@ pyparsing==2.2.0
 pytest==3.7.2
 python-dateutil==2.7.3
 pytz==2018.5
-PyYAML==3.13
+PyYAML==5.4
 pyzmq==17.1.2
 qtconsole==4.4.1
 scipy==1.1.0