diff --git a/source/serialization.txt b/source/serialization.txt
index 723e7d5e..f0b439ec 100644
--- a/source/serialization.txt
+++ b/source/serialization.txt
@@ -56,19 +56,40 @@ Serializing Custom Classes
 
 To serialize a custom class, you must convert the class to a dictionary. The following
 example serializes a custom class by using the ``vars()`` method, and then inserts the
-serialized object into a collection:
+serialized object into a collection. Select the :guilabel:`Synchronous` or :guilabel:`Asynchronous`
+tab to see the corresponding code:
 
-.. code-block:: python
+.. tabs::
+
+   .. tab:: Synchronous
+      :tabid: sync
+
+      .. code-block:: python
+
+         class Restaurant:
+            def __init__(self, name, cuisine):
+               self.name = name
+               self.cuisine = cuisine
+         
+         restaurant = Restaurant("Example Cafe", "Coffee")
+         restaurant_dict = vars(restaurant)
+
+         collection.insert_one(restaurant_dict)
+
+   .. tab:: Asynchronous
+      :tabid: async
 
-   class Restaurant:
-       def __init__(self, name, cuisine):
-           self.name = name
-           self.cuisine = cuisine
+      .. code-block:: python
 
-   restaurant = Restaurant("Example Cafe", "Coffee")
-   restaurant_dict = vars(restaurant)
+         class Restaurant:
+            def __init__(self, name, cuisine):
+               self.name = name
+               self.cuisine = cuisine
+         
+         restaurant = Restaurant("Example Cafe", "Coffee")
+         restaurant_dict = vars(restaurant)
 
-   collection.insert_one(restaurant_dict)
+         await collection.insert_one(restaurant_dict)
 
 The preceding example serializes the ``Restaurant`` object into the following dictionary:
 
@@ -84,15 +105,32 @@ Deserializing Custom Classes
 
 To deserialize a custom class, you must convert the dictionary back into an instance of
 the class. The following example retrieves a document from a collection, and then converts
-it back into a ``Restaurant`` object from the preceding example:
+it back into a ``Restaurant`` object from the preceding example. Select the
+:guilabel:`Synchronous` or :guilabel:`Asynchronous` tab to see the corresponding code:
+
+.. tabs::
+
+   .. tab:: Synchronous
+      :tabid: sync
+
+      .. code-block:: python
+
+         def deserialize_restaurant(doc):
+            return Restaurant(name=doc["name"], cuisine=doc["cuisine"])
+         
+         restaurant_doc = collection.find_one({"name": "Example Cafe"})
+         restaurant = deserialize_restaurant(restaurant_doc)
+
+   .. tab:: Asynchronous
+      :tabid: async
 
-.. code-block:: python
+      .. code-block:: python
 
-   def deserialize_restaurant(doc):
-       return Restaurant(name=doc["name"], cuisine=doc["cuisine"])
+         def deserialize_restaurant(doc):
+            return Restaurant(name=doc["name"], cuisine=doc["cuisine"])
 
-   restaurant_doc = collection.find_one({"name": "Example Cafe"})
-   restaurant = deserialize_restaurant(restaurant_doc)
+         restaurant_doc = await collection.find_one({"name": "Example Cafe"})
+         restaurant = deserialize_restaurant(restaurant_doc)
 
 To learn more about retrieving documents from a collection, see the :ref:`pymongo-retrieve`
 guide.