diff --git a/requirements.txt b/requirements.txt
index 88d76db..2451321 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 flask==1.1.1
 redis==2.10.5
-PyYAML==5.1
+PyYAML==5.4
 requests==2.20.0
 python-dateutil==2.6.0