diff --git a/app/Models/Setting.php b/app/Models/Setting.php
index 0f3cb48039..c2ba250837 100755
--- a/app/Models/Setting.php
+++ b/app/Models/Setting.php
@@ -14,35 +14,35 @@ class Setting extends Model
 
     protected $rules = [
           "brand"     => 'required|min:1|numeric',
-          "qr_text"         => 'max:31',
+          "qr_text"         => 'max:31|nullable',
           "logo_img"        => 'mimes:jpeg,bmp,png,gif',
-          "alert_email"   => 'email_array',
+          "alert_email"   => 'email_array|nullable',
           "default_currency"   => 'required',
           "locale"   => 'required',
-          "slack_endpoint"   => 'url|required_with:slack_channel',
-          "slack_channel"   => 'regex:/(?<!\w)#\w+/|required_with:slack_endpoint',
+          "slack_endpoint"   => 'url|required_with:slack_channel|nullable',
+          "slack_channel"   => 'regex:/(?<!\w)#\w+/|required_with:slack_endpoint|nullable',
           "slack_botname"   => 'string|nullable',
           'labels_per_page' => 'numeric',
           'labels_width' => 'numeric',
           'labels_height' => 'numeric',
-          'labels_pmargin_left' => 'numeric',
-          'labels_pmargin_right' => 'numeric',
-          'labels_pmargin_top' => 'numeric',
-          'labels_pmargin_bottom' => 'numeric',
-          'labels_display_bgutter' => 'numeric',
-          'labels_display_sgutter' => 'numeric',
+          'labels_pmargin_left' => 'numeric|nullable',
+          'labels_pmargin_right' => 'numeric|nullable',
+          'labels_pmargin_top' => 'numeric|nullable',
+          'labels_pmargin_bottom' => 'numeric|nullable',
+          'labels_display_bgutter' => 'numeric|nullable',
+          'labels_display_sgutter' => 'numeric|nullable',
           'labels_fontsize' => 'numeric|min:5',
-          'labels_pagewidth' => 'numeric',
-          'labels_pageheight' => 'numeric',
-          "ldap_server"   => 'sometimes|required_if:ldap_enabled,1|url',
-          "ldap_uname"     => 'sometimes|required_if:ldap_enabled,1',
-          "ldap_basedn"     => 'sometimes|required_if:ldap_enabled,1',
-          "ldap_filter"     => 'sometimes|required_if:ldap_enabled,1',
-          "ldap_username_field"     => 'sometimes|required_if:ldap_enabled,1',
-          "ldap_fname_field"     => 'sometimes|required_if:ldap_enabled,1',
-          "ldap_lname_field"     => 'sometimes|required_if:ldap_enabled,1',
-          "ldap_auth_filter_query"     => 'sometimes|required_if:ldap_enabled,1',
-          "ldap_version"     => 'sometimes|required_if:ldap_enabled,1',
+          'labels_pagewidth' => 'numeric|nullable',
+          'labels_pageheight' => 'numeric|nullable',
+          "ldap_server"   => 'sometimes|required_if:ldap_enabled,1|url|nullable',
+          "ldap_uname"     => 'sometimes|required_if:ldap_enabled,1|nullable',
+          "ldap_basedn"     => 'sometimes|required_if:ldap_enabled,1|nullable',
+          "ldap_filter"     => 'sometimes|required_if:ldap_enabled,1|nullable',
+          "ldap_username_field"     => 'sometimes|required_if:ldap_enabled,1|nullable',
+          "ldap_fname_field"     => 'sometimes|required_if:ldap_enabled,1|nullable',
+          "ldap_lname_field"     => 'sometimes|required_if:ldap_enabled,1|nullable',
+          "ldap_auth_filter_query"     => 'sometimes|required_if:ldap_enabled,1|nullable',
+          "ldap_version"     => 'sometimes|required_if:ldap_enabled,1|nullable',
           "thumbnail_max_h"     => 'numeric|max:500|min:25',
     ];