diff --git a/requirements.txt b/requirements.txt
index ea6917c..d240d4b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 Flask==1.1.1
-PyYAML==5.3
+PyYAML==5.4
 flask-swagger==0.2.14
 xmltodict==0.12.0
 Flask-HTTPAuth==3.3.0