diff --git a/demo-attachment/src/classes/SharinPixDemoAttachmentUpload.cls b/demo-attachment/src/classes/SharinPixDemoAttachmentUpload.cls
index 42c77a5..ba29f15 100644
--- a/demo-attachment/src/classes/SharinPixDemoAttachmentUpload.cls
+++ b/demo-attachment/src/classes/SharinPixDemoAttachmentUpload.cls
@@ -12,10 +12,10 @@ public class SharinPixDemoAttachmentUpload {
     }
 
     @future (callout=true)
-    public static void upload_photo(string attachmentId, string caseId){
-        SharinPix.Client clientInstance = SharinPix.Client.getInstance();
-        if (clientInstance!=null){
-            clientInstance.upload_attachment(attachmentId, caseId);
+    public static void upload_photo(Id attachmentId, string caseId){
+        SharinPix.Utils utils = new SharinPix.Utils();
+        if (utils!=null){
+            utils.uploadAttachment(attachmentId, caseId);
         }
         else {
             system.debug('### Error occurred');