diff --git a/webviz_config/containers/_container_class.py b/webviz_config/containers/_container_class.py
index d4426f84..7df62fd6 100644
--- a/webviz_config/containers/_container_class.py
+++ b/webviz_config/containers/_container_class.py
@@ -43,6 +43,7 @@ def layout(self):
     # All paths in the returned ASSETS list should be absolute.
     ASSETS = []
 
+    @property
     @abc.abstractmethod
     def layout(self):
         """This is the only required function of a Webviz Container.