diff --git a/requirements.txt b/requirements.txt
index ad881fc..63da336 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -31,7 +31,7 @@ pymongo==3.8.0
 python-dateutil==2.8.0
 python-editor==1.0.4
 pytz==2019.1
-PyYAML==5.1.1
+PyYAML==5.4
 querystring-parser==1.2.3
 requests==2.22.0
 scikit-learn==0.21.2