diff --git a/application/controllers/SupplyChainController.php b/application/controllers/SupplyChainController.php
index 04c40ca..a6979df 100644
--- a/application/controllers/SupplyChainController.php
+++ b/application/controllers/SupplyChainController.php
@@ -35,6 +35,7 @@ class SupplyChainController extends BaseController
             'service_type'        => $this->getParam('service_type'),
             'service_description' => $this->getParam('service_description'),
             'criticality'         => $this->getParam('criticality', 'medium'),
+            'category_id'         => $this->getParam('category_id') ?: null,
             'contract_start_date' => $this->getParam('contract_start_date'),
             'contract_expiry_date' => $this->getParam('contract_expiry_date'),
             'notes'               => $this->getParam('notes'),
@@ -66,7 +67,7 @@ class SupplyChainController extends BaseController
 
         $updates = [];
         $fields = ['name', 'vat_number', 'contact_email', 'contact_name', 'service_type',
-                    'service_description', 'criticality', 'contract_start_date', 'contract_expiry_date',
+                    'service_description', 'criticality', 'category_id', 'contract_start_date', 'contract_expiry_date',
                     'security_requirements_met', 'notes', 'status'];
 
         foreach ($fields as $field) {