diff --git a/dev/requirements.txt b/dev/requirements.txt
index 549594f..6f6668b 100644
--- a/dev/requirements.txt
+++ b/dev/requirements.txt
@@ -9,7 +9,7 @@ GeoAlchemy2==0.4.0
 Jinja2==2.8
 Mako==1.0.6
 MarkupSafe==0.23
-PyYAML==3.12
+PyYAML==5.4
 SQLAlchemy==1.1.4
 Shapely==1.5.17
 WTForms==2.1