diff --git a/requirements.txt b/requirements.txt
index 9478df9..b0cbfc9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -67,7 +67,7 @@ pyrsistent==0.16.0
 python-dateutil==2.8.1
 python-dotenv==0.14.0
 pytz==2020.1
-PyYAML==5.3.1
+PyYAML==5.4
 pyzmq==19.0.2
 requests==2.24.0
 roman==3.3