diff --git a/app/Filament/Resources/InvoiceValidationResource.php b/app/Filament/Resources/InvoiceValidationResource.php
index 53fc5cf..eca071d 100644
--- a/app/Filament/Resources/InvoiceValidationResource.php
+++ b/app/Filament/Resources/InvoiceValidationResource.php
@@ -430,7 +430,7 @@ class InvoiceValidationResource extends Resource
                         $originalName = $uploadedFile->getClientOriginalName(); // e.g. 3RA0018732.xlsx
 
                         $extension = strtolower(pathinfo($originalName, PATHINFO_EXTENSION));
-                        if ($extension !== 'xlsx') {
+                        if ($extension != 'xlsx') {
                             throw new \Exception('Only .xlsx files allowed.');
                         }
 
@@ -770,7 +770,7 @@ class InvoiceValidationResource extends Resource
                         $originalName = $uploadedFile->getClientOriginalName();
 
                         $extension = strtolower(pathinfo($originalName, PATHINFO_EXTENSION));
-                        if ($extension !== 'xlsx') {
+                        if ($extension != 'xlsx') {
                             throw new \Exception('Only .xlsx files allowed.');
                         }