diff --git a/requirements.txt b/requirements.txt
index f6334f8..c03c831 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -68,7 +68,7 @@ python-engineio==3.8.2.post1
 python-mimeparse==1.6.0
 python-socketio==1.9.0
 pytz==2017.3
-PyYAML==5.1
+PyYAML==5.4
 raven==6.5.0
 requests==2.20.0
 Rx==1.6.0