diff --git a/freeriders/routes.py b/freeriders/routes.py
index eac5d8d..3ec91b8 100644
--- a/freeriders/routes.py
+++ b/freeriders/routes.py
@@ -21,7 +21,11 @@ def submit():
     elif request.method == 'POST':
         timenow = int(time.time())
         ticket_input = request.form['ticket']
-        ticket = Ticket(ticket = ticket_input, timestamp = timenow)
+
+        if ticket_input.isdigit() and len(ticket_input) == 10:
+            ticket = Ticket(ticket = int(ticket_input), timestamp = timenow)
+        else:
+            return 'Ticket format is wrong. Only 10 digits allowed.'
 
         try:
             db.session.add(ticket)