diff --git a/activitystreams-derive/src/lib.rs b/activitystreams-derive/src/lib.rs
index 345a471..76a497d 100644
--- a/activitystreams-derive/src/lib.rs
+++ b/activitystreams-derive/src/lib.rs
@@ -142,14 +142,22 @@ pub fn ref_derive(input: TokenStream) -> TokenStream {
             let name = name.clone();
             let ext_trait = Ident::new(&format!("{}Ext", object), name.span());
 
+            let tt = if object.to_string() == "Object" || object.to_string() == "Link" {
+                quote! {
+                    #[typetag::serde]
+                }
+            } else {
+                quote! {}
+            };
+
             let activity_impls = quote! {
-                #[typetag::serde]
+                #tt
                 impl #object for #name {
-                    fn as_any(&self) -> &std::any::Any {
+                    fn as_any(&self) -> &dyn std::any::Any {
                         self
                     }
 
-                    fn as_any_mut(&self) -> &mut std::any::Any {
+                    fn as_any_mut(&self) -> &mut dyn std::any::Any {
                         self
                     }
                 }
diff --git a/activitystreams-types/src/object/properties.rs b/activitystreams-types/src/object/properties.rs
index 2db4dbd..95a0186 100644
--- a/activitystreams-types/src/object/properties.rs
+++ b/activitystreams-types/src/object/properties.rs
@@ -25,6 +25,7 @@
 //! use activitystreams_traits::Object;
 //! use activitystreams_types::object::properties::ObjectProperties;
 //! use serde_derive::{Deserialize, Serialize};
+//! use std::any::Any;
 //!
 //! #[derive(Clone, Debug, Serialize, Deserialize)]
 //! #[serde(rename_all = "camelCase")]
@@ -39,7 +40,15 @@
 //!     pub object_properties: ObjectProperties,
 //! }
 //!
-//! impl Object for MyObject {}
+//! impl Object for MyObject {
+//!     fn as_any(&self) -> &dyn Any {
+//!         self
+//!     }
+//!
+//!     fn as_any_mut(&mut self) -> &mut dyn Any {
+//!         self
+//!     }
+//! }
 //! #
 //! # fn main() {}
 //! ```