diff --git a/ros/wf5/requirements.txt b/ros/wf5/requirements.txt
index 467acc1..8a3879d 100644
--- a/ros/wf5/requirements.txt
+++ b/ros/wf5/requirements.txt
@@ -65,7 +65,7 @@ pysolr==3.8.1
 pytest==3.8.2
 python-dateutil==2.7.3
 pytz==2018.5
-PyYAML==3.13
+PyYAML==5.4
 rdflib==4.2.2
 rdflib-jsonld==0.4.0
 readme-renderer==22.0