Typo manger => manager

docs/api-guide/serializers.md

@@ -384,7 +384,7 @@ This manager class now more nicely encapsulates that user instances and profile
             has_support_contract=validated_data['profile']['has_support_contract']
         )
 
-For more details on this approach see the Django documentation on [model managers](model-managers), and [this blogpost on using model and manger classes](encapsulation-blogpost).
+For more details on this approach see the Django documentation on [model managers](model-managers), and [this blogpost on using model and manager classes](encapsulation-blogpost).
 
 ## Dealing with multiple objects