diff --git a/requirements.txt b/requirements.txt
index 8bcd247..5840357 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -94,7 +94,7 @@ pyparsing==2.2.1
 pytest==3.9.1
 python-dateutil==2.7.3
 pytz==2018.5
-PyYAML==5.1
+PyYAML==5.4
 pyzmq==17.1.2
 qtconsole==4.4.1
 querystring-parser==1.2.3