diff --git a/DoliMiddlewareApi/Services/InvoiceService.cs b/DoliMiddlewareApi/Services/InvoiceService.cs
index 4a1fc46..854f3dc 100644
--- a/DoliMiddlewareApi/Services/InvoiceService.cs
+++ b/DoliMiddlewareApi/Services/InvoiceService.cs
@@ -34,7 +34,7 @@ public class InvoiceService(IDolibarrApiClient apiClient)
         if (!string.IsNullOrWhiteSpace(search))
         {
             search=search.Trim().ToUpperInvariant();
-            var filter = $"(t.ref:like:'{search}%')";
+            var filter = $"(t.ref:like:'%{search}%')";
             endpoint += $"&sqlfilters={Uri.EscapeDataString(filter)}";
         }