diff --git a/src/Contracts/InstanceIdentifier.php b/src/Contracts/InstanceIdentifier.php
index 277ab89..6c30cc2 100644
--- a/src/Contracts/InstanceIdentifier.php
+++ b/src/Contracts/InstanceIdentifier.php
@@ -9,12 +9,12 @@ interface InstanceIdentifier
      *
      * @return int|string
      */
-    public function getInstanceIdentifier($options = null);
+    public function getInstanceIdentifier();
 
     /**
      * Get the unique identifier to load the Cart from.
      *
      * @return int|string
      */
-    public function getInstanceGlobalDiscount($options = null);
+    public function getInstanceGlobalDiscount();
 }