diff --git a/dash/dash.py b/dash/dash.py
index 2c42cff92b..3d5c181ec9 100644
--- a/dash/dash.py
+++ b/dash/dash.py
@@ -441,6 +441,7 @@ def layout(self, value):
                 'or a function that returns '
                 'a dash component.')
 
+        self._cached_layout = None
         self._layout = value
 
     @property