diff --git a/requirements.txt b/requirements.txt
index 6b46e41..dd10aff 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -68,7 +68,7 @@ pyrsistent==0.15.2
 pytest==5.0.1
 python-dateutil==2.8.0
 pytz==2019.1
-PyYAML==5.1.1
+PyYAML==5.4
 pyzmq==18.0.1
 readme-renderer==24.0
 requests==2.22.0