diff --git a/Modules/M3/Http/Controllers/API/CloseShipmentProcessor.php b/Modules/M3/Http/Controllers/API/CloseShipmentProcessor.php
index 6b1e93e2..4d5b7711 100644
--- a/Modules/M3/Http/Controllers/API/CloseShipmentProcessor.php
+++ b/Modules/M3/Http/Controllers/API/CloseShipmentProcessor.php
@@ -16,7 +16,6 @@ use Throwable;
 final class CloseShipmentProcessor
 {
     private const ZERO_PAD = '000000';
-    private const JSON_CONTENT_TYPE = 'application/json';
     private const NULL_M3_RESPONSE = 'M3 API responded with null value';
     private const SOURCE = 'CloseShipmentCoChargeAPI';