diff --git a/requirements.txt b/requirements.txt
index 474b7ac..7f89b7e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ kombu==4.1.0
 psycopg2==2.7.3.1
 python-mimeparse==1.6.0
 pytz==2017.2
-PyYAML==5.1
+PyYAML==5.4
 redis==2.10.6
 six==1.11.0
 ujson==1.35