diff --git a/src/nalodeni/models.py b/src/nalodeni/models.py
index a453e7a..0d4aebb 100644
--- a/src/nalodeni/models.py
+++ b/src/nalodeni/models.py
@@ -150,7 +150,7 @@ class AppUser(AbstractUser, DataAudited):
     ##
     #   User self-editable fields
     ##
-    postcode = IntegerField(_('PSČ'), blank=False, null=True)
+    postcode = IntegerField(_('PSČ'), blank=True, null=True)
     city = CharField(_(u'Město'), max_length=120, default=None,
                             blank=True, null=True)
     district = IntegerField(_('Kraj'), blank=True, null=True,
diff --git a/src/nalodeni/people.py b/src/nalodeni/people.py
index 8f36929..ae5750c 100644
--- a/src/nalodeni/people.py
+++ b/src/nalodeni/people.py
@@ -303,10 +303,12 @@ def person_edit(request, id):
 
     if request.method == "GET":
         form = _form(instance=obj)
+        form.fields['email_contact'].disabled = True
 
     elif request.method == "POST":
         with obj.audit_context(request.user) as ac:
             form = _form(request.POST, instance=obj)
+            form.fields['email_contact'].disabled = True
             if form.is_valid():
                 form.save()