diff --git a/requirements.txt b/requirements.txt
index 7b213a13..ec366bf6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,5 +4,5 @@ django-tastypie==0.14.2 # API
 django-registration==3.0 # account logic, views and workflows
 pytz==2018.9
 ordereddict==1.1
-PyYAML==3.13
+pyyaml>=4.2b1
 pySankeyBeta==1.0.4