diff --git a/requirements.txt b/requirements.txt
index 64ca85cd..cb904790 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 flask==0.12.2
 werkzeug==0.9.6
 tornado==4.4.2
-PyYAML==3.11
+PyYAML==5.4
 Flask-Login==0.4.1
 Flask-Principal==0.4.0
 Flask-Assets==0.12