diff --git a/user/user.py b/user/user.py
index 4e8f046..eb3ce46 100755
--- a/user/user.py
+++ b/user/user.py
@@ -106,7 +106,7 @@ class ValidateInputSchemaUser(Schema):
     strasse1 = fields.Str(required=True, validate=Length(max=128))
     strasse2 = fields.Str(required=False, validate=Length(max=128))
     land = fields.Str(required=True, validate=Length(max=2))
-    plz = fields.Int(required=True)
+    plz = fields.Str(required=True)
     ort = fields.Str(required=False, validate=Length(max=128))
     telefon = fields.Str(required=False, validate=Length(max=64))
     telefax = fields.Str(required=False, validate=Length(max=64))