diff --git a/python/users/requirements.txt b/python/users/requirements.txt
index 2a71806..b37b411 100644
--- a/python/users/requirements.txt
+++ b/python/users/requirements.txt
@@ -9,5 +9,5 @@ Jinja2==2.10
 MarkupSafe==1.0
 marshmallow==2.15.0
 pika==0.11.2
-PyYAML==3.12
+PyYAML==5.4
 Werkzeug==0.14.1