diff --git a/requirements.txt b/requirements.txt
index a5d300e..226bf4b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ MarkupSafe==1.0
 marshmallow==2.15.3
 oyaml==0.5
 pipreqs==0.4.9
-PyYAML==5.1
+PyYAML==5.4
 requests==2.20.0
 urllib3==1.24.2
 Werkzeug==0.15.3