diff --git a/requirements.txt b/requirements.txt
index 48bb4c5..4137caa 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,7 +14,7 @@ MarkupSafe==1.1.1
 openapi-spec-validator==0.2.8
 pymongo==3.9.0
 python-dateutil==2.8.0
-PyYAML==5.1.2
+PyYAML==5.4
 requests==2.22.0
 six==1.12.0
 swagger-ui-bundle==0.0.5