diff --git a/alkatorapi/views.py b/alkatorapi/views.py
index 3f41226..1ccaf82 100644
--- a/alkatorapi/views.py
+++ b/alkatorapi/views.py
@@ -45,11 +45,14 @@ def register(request):
     invoice_date = datetime.today()
     invoice_id = invoice_date.year * 1000000 + invoice_date.month * 10000 + invoice_date.day * 100
 
-    latest_user = User.objects.latest("invoice_id")
-    if latest_user.invoice_id < invoice_id:
+    try:
+        latest_user = User.objects.latest("invoice_id")
+        if latest_user.invoice_id < invoice_id:
+            invoice_id = invoice_id + 1
+        else:
+            invoice_id = latest_user.invoice_id + 1
+    except User.DoesNotExist:
         invoice_id = invoice_id + 1
-    else:
-        invoice_id = latest_user.invoice_id + 1
 
     user = User(
         first_name=request.POST['first_name'],