diff --git a/requirements.txt b/requirements.txt
index 2abaef0..0a42126 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -48,7 +48,7 @@ pyparsing==2.4.6
 pyrsistent==0.15.7
 python-dateutil==2.8.1
 pytz==2019.3
-PyYAML==5.3
+PyYAML==5.4
 pyzmq==18.1.1
 scikit-learn==0.22.1
 scipy==1.4.1