Does this code violate open-closed principle?

I want to know if the below code is violating open closed principle.

Animal is a parent class of Dog, however Animal has jackson annotations that help ObjectMapper (de)serialize the classes. Anyone who extends Animal will have to edit only annotations present on Animal to make sure (de)serialization works as intended leaving the class untouched.

@JsonTypeInfo(
  use = JsonTypeInfo.Id.NAME, 
  include = JsonTypeInfo.As.PROPERTY, 
  property = "type")
@JsonSubTypes({ 
  // all subclasses
  @Type(value = Dog.class, name = "dog")
})
public abstract class Animal {
    // fields, constructors, getters and setters
}

public class Dog extends Animal {

}