diff --git a/README.md b/README.md
index 409dadf..b155ac1 100644
--- a/README.md
+++ b/README.md
@@ -110,21 +110,17 @@ #### Round Mode
 
 ### Basic Usage
 
-The cart has a default sessionKey that holds the cart data and stores it in the session. 
+The cart has a default sessionKey that holds the cart data and stores it in the session, so you can have multiple carts for multiple users.
 
-This
-also serves as a cart unique identifier which you can use to bind a cart to a specific user if you want to.
+This also serves as a cart unique identifier which you can use to bind a cart to a specific user if you want to.
 
-Make sure to call `\Cart::session($sessionKey)` before calling any other cart methods.
+Make sure to call `\Cart::setSessionKey($sessionKey)` before calling any other cart methods.
 
 Usually this is not required.
 
 ```php
 // Binds the cart to a unique id (user id, session id, etc.)
-\Cart::session(User::first()->id);
-
-// If you don't want to bind the cart on a project level, you can add it to each call
-\Cart::session(User::first()->id)->add(1, 'Product 1', 19.99, 2, ['size' => 'large']);
+\Cart::setSessionKey(User::first()->id);
 ```
 
 #### Adding to the cart: **Cart::add()**
diff --git a/composer.json b/composer.json
index 158bb78..529de6c 100644
--- a/composer.json
+++ b/composer.json
@@ -1,6 +1,6 @@
 {
   "name": "joelwmale/laravel-cart",
-  "version": "1.2.0",
+  "version": "1.2.1",
   "description": "A cart implementation for Laravel",
   "keywords": [
     "laravel",
diff --git a/src/Cart.php b/src/Cart.php
index afc2d40..a0865a3 100644
--- a/src/Cart.php
+++ b/src/Cart.php
@@ -56,6 +56,16 @@ private function validateConfig($config)
         }
     }
 
+    public function getSessionKey(): string
+    {
+        return $this->session->getSessionKey();
+    }
+
+    public function setSessionKey(string $sessionKey): void
+    {
+        $this->session->setSessionKey($sessionKey);
+    }
+
     /**
      * get instance name of the cart
      *
diff --git a/src/CartSession.php b/src/CartSession.php
index 38b11e6..69ffb37 100644
--- a/src/CartSession.php
+++ b/src/CartSession.php
@@ -47,6 +47,34 @@ public function isInternalSession($session)
         ]);
     }
 
+    public function getSessionKey()
+    {
+        return $this->sessionKey;
+    }
+
+    public function setSessionKey(string $sessionKey)
+    {
+        // set the session key and then update the session
+        $this->sessionKey = $sessionKey;
+
+        if ($this->driver == 'session') {
+            $session = $this->session->get($this->itemsKey);
+            $sessionKey = $this->session->get($this->conditionsKey);
+
+            $this->session->forget($this->itemsKey);
+            $this->session->forget($this->conditionsKey);
+
+            $this->itemsKey = $this->sessionKey . '_cart_items';
+            $this->conditionsKey = $this->sessionKey . '_cart_conditions';
+
+            $this->session->put($this->itemsKey, $session);
+            $this->session->put($this->conditionsKey, $sessionKey);
+        } elseif ($this->driver == 'database') {
+            $this->session[$this->sessionId] = $sessionKey;
+            $this->session->save();
+        }
+    }
+
     public function has($key)
     {
         return $this->session->has($key) ?? $this->session;
diff --git a/tests/Unit/CartTest.php b/tests/Unit/CartTest.php
index d0057a9..bb6c7ca 100644
--- a/tests/Unit/CartTest.php
+++ b/tests/Unit/CartTest.php
@@ -689,3 +689,15 @@
     expect($this->cart->getTotalQuantity())->toBeInt('Return type should be INT');
     expect($this->cart->getTotalQuantity())->toEqual(12, 'Cart\'s quantity should be 4.');
 });
+
+test('can add to cart and then update the session key', function () {
+    $this->cart->add(1, 'Sample Item', 100.99, 2, []);
+
+    expect($this->cart->getContent()->count())->toEqual(1, 'Cart content should be 1');
+    expect($this->cart->getContent()->first()['id'])->toEqual(1, 'Item added has ID of 1 so first content ID should be 1');
+
+    $this->cart->setSessionKey('new_session_key');
+
+    expect($this->cart->getSessionKey())->toEqual('new_session_key', 'Session key should be updated to new_session_key');
+    expect($this->cart->getContent()->count())->toEqual(1, 'Cart content should still be 1');
+});