diff --git a/requirements.txt b/requirements.txt
index 593172c..2d37d22 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,5 +4,5 @@ Flask==1.0.2
 itsdangerous==0.24
 Jinja2==2.10
 MarkupSafe==1.0
-PyYAML==5.1
+PyYAML==5.4
 Werkzeug==0.14.1