diff --git a/demos/er.html b/demos/er.html
index 06fbf020e..124311a03 100644
--- a/demos/er.html
+++ b/demos/er.html
@@ -40,7 +40,7 @@ erDiagram
       string city
       string region
       string state
-      string postal_code
+      string(5) postal_code
       string country
       }