diff --git a/requirements.txt b/requirements.txt
index f10e4e6..9030b1e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,7 +20,7 @@ openapi-spec-validator==0.2.4
 pycodestyle==2.5.0
 pylint==2.3.1
 python-dateutil==2.7.5
-PyYAML==5.1
+PyYAML==5.4
 requests==2.21.0
 six==1.12.0
 swagger-ui-bundle==0.0.2