diff --git a/requirements.txt b/requirements.txt
index 14204b9..0330a91 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -23,7 +23,7 @@ openapi-spec-validator==0.2.8
 peewee==3.13.1
 peewee-db-evolve==3.7.3
 pyrsistent==0.15.7
-PyYAML==5.3
+PyYAML==5.4
 requests==2.22.0
 six==1.14.0
 swagger-ui-bundle==0.0.6