diff --git a/requirements.txt b/requirements.txt
index 17771b0..b6f2445 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -59,7 +59,7 @@ pyparsing==2.0.3
 pyreadline==2.1
 python-dateutil==2.6.0
 pytz==2016.7
-PyYAML==5.1
+PyYAML==5.4
 pyzmq==16.0.1
 qtconsole==4.1.1
 requests==2.20.0