diff --git a/app/system/backend/sync_router.py b/app/system/backend/sync_router.py
index df00a2b..844d51b 100644
--- a/app/system/backend/sync_router.py
+++ b/app/system/backend/sync_router.py
@@ -502,10 +502,11 @@ async def sync_from_economic() -> Dict[str, Any]:
                 )
             
             if existing:
-                # Update existing customer
+                # Update existing customer (always sync economic_customer_number from e-conomic)
                 update_query = """
                     UPDATE customers SET 
                         name = %s,
+                        economic_customer_number = %s,
                         cvr_number = %s,
                         email_domain = %s,
                         city = %s,
@@ -516,7 +517,7 @@ async def sync_from_economic() -> Dict[str, Any]:
                     WHERE id = %s
                 """
                 execute_query(update_query, (
-                    name, cvr, email_domain, city, zip_code, country, website, existing[0]['id']
+                    name, customer_number, cvr, email_domain, city, zip_code, country, website, existing[0]['id']
                 ))
                 updated_count += 1
                 logger.info(f"✏️  Opdateret: {name} (e-conomic #{customer_number}, CVR: {cvr or 'ingen'})")