diff --git a/app/modules/loyalty/services/card_service.py b/app/modules/loyalty/services/card_service.py
index c01ece46..b5c35626 100644
--- a/app/modules/loyalty/services/card_service.py
+++ b/app/modules/loyalty/services/card_service.py
@@ -393,12 +393,14 @@ class CardService:
             query = query.filter(LoyaltyCard.is_active == is_active)
 
         if search:
+            from sqlalchemy import func
+
             # Normalize search term for card number matching
             search_normalized = search.replace("-", "").replace(" ", "")
             # Use relationship-based join to avoid direct Customer model import
             CustomerModel = LoyaltyCard.customer.property.mapper.class_
             query = query.join(LoyaltyCard.customer).filter(
-                (LoyaltyCard.card_number.replace("-", "").ilike(f"%{search_normalized}%"))
+                (func.replace(LoyaltyCard.card_number, "-", "").ilike(f"%{search_normalized}%"))
                 | (CustomerModel.email.ilike(f"%{search}%"))
                 | (CustomerModel.first_name.ilike(f"%{search}%"))
                 | (CustomerModel.last_name.ilike(f"%{search}%"))