diff --git a/requirements/main.txt b/requirements/main.txt
index d415f10..a9d5a42 100644
--- a/requirements/main.txt
+++ b/requirements/main.txt
@@ -2,7 +2,7 @@ blinker==1.3
 Flask==1.0
 gevent==1.0.2
 gunicorn==19.5.0
-PyYAML==5.1
+PyYAML==5.4
 requests==2.20.0
 M2Crypto==0.22.3
 sqlalchemy==1.3.0