diff --git a/requirements.txt b/requirements.txt
index 4ddacfe..6d790f3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ Flask-SQLAlchemy==1.0
 Jinja2==2.7.3
 Mako==1.0.0
 MarkupSafe==0.23
-PyYAML==3.11
+PyYAML==5.4
 SQLAlchemy==0.9.4
 Werkzeug==0.9.6
 alembic==0.6.5