diff --git a/src/lib/shopify.ts b/src/lib/shopify.ts
index 005b767..56d50e5 100644
--- a/src/lib/shopify.ts
+++ b/src/lib/shopify.ts
@@ -36,18 +36,19 @@ export async function searchProductByRef(ref: string): Promise<ShopifyProductRes
     if (!res.ok) return { found: false }
     const data = await res.json()
     const variants = (data.variants ?? []) as Array<{ id: number; sku: string; product_id: number }>
-    if (variants.length === 0) return { found: false }
+    const match = variants.find(v => v.sku === sku)
+    if (!match) return { found: false }
 
     // Récupère le titre du produit
     const productRes = await fetch(
-      `${baseUrl}/products/${variants[0].product_id}.json?fields=id,title`,
+      `${baseUrl}/products/${match.product_id}.json?fields=id,title`,
       { headers },
     )
     if (!productRes.ok) return { found: false }
     const productData = await productRes.json()
     return {
       found: true,
-      shopifyId: String(variants[0].product_id),
+      shopifyId: String(match.product_id),
       title: productData.product?.title ?? sku,
     }
   }