diff --git a/yellow/routes.py b/yellow/routes.py
index 608bdd3..1bb801f 100644
--- a/yellow/routes.py
+++ b/yellow/routes.py
@@ -38,6 +38,8 @@ async def dashboard_address_post():
     address = form.get('address')
     if len(address) != 97:
         raise Exception("Please submit a WOW address")
+    elif not address.isalnum():
+        raise Exception("Please submit a WOW address")
 
     # update user
     from yellow.models import User