diff --git a/smash/web/forms/voucher_forms.py b/smash/web/forms/voucher_forms.py
index 6c8e2f4ca24532dda19938b9727384bbc3074806..926f45bab92a66a898e5e97720cfaea0b7b584f4 100644
--- a/smash/web/forms/voucher_forms.py
+++ b/smash/web/forms/voucher_forms.py
@@ -80,6 +80,7 @@ class VoucherForm(ModelForm):
         self.fields['expiry_date'].required = False
         instance = getattr(self, 'instance', None)
         if instance and instance.pk:
+            self.fields['issue_date'].widget.attrs['readonly'] = True
             self.fields['voucher_type'].widget.attrs['readonly'] = True
             self.fields['hours'].widget.attrs['readonly'] = True
             self.fields['activity_type'].widget.attrs['readonly'] = True