diff --git a/requirements.txt b/requirements.txt
index 392dca8..3c9d856 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,7 +10,7 @@ Jinja2==2.10
 locustio==0.8.1
 MarkupSafe==1.0
 msgpack-python==0.5.6
-PyYAML==4.2b1
+PyYAML==5.4
 pyzmq==17.1.2
 requests==2.20.1
 six==1.11.0