diff --git a/requirements.txt b/requirements.txt
index 1044515..e138c42 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,7 +17,7 @@ mongoengine==0.18.2
 pika==1.1.0
 pymongo==3.9.0
 pyrsistent==0.15.4
-PyYAML==5.1.2
+PyYAML==5.4
 redis==3.3.8
 requests==2.22.0
 six==1.12.0