diff --git a/Cargo.toml b/Cargo.toml
index e34159c..0279f32 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "activitystreams"
 description = "Activity Streams in Rust"
-version = "0.5.0-alpha.16"
+version = "0.5.0-alpha.17"
 license = "GPL-3.0"
 authors = ["asonix <asonix@asonix.dog>"]
 repository = "https://git.asonix.dog/Aardwolf/activitystreams"
@@ -17,7 +17,7 @@ primitives = ["chrono", "mime", "serde", "thiserror", "url"]
 types = ["derive", "kinds", "primitives"]
 
 [dependencies]
-activitystreams-derive = { version = "0.5.0-alpha.8", path = "activitystreams-derive", optional = true}
+activitystreams-derive = { version = "0.5.0-alpha.9", path = "activitystreams-derive", optional = true}
 chrono = { version = "0.4", optional = true }
 mime = { version = "0.3", optional = true }
 serde = { version = "1.0", features = ["derive"], optional = true }
diff --git a/README.md b/README.md
index 1f57556..849a9a4 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ __A set of Traits and Types that make up the ActivityStreams and ActivityPub spe
 
 First, add ActivityStreams to your dependencies
 ```toml
-activitystreams = "0.5.0-alpha.16"
+activitystreams = "0.5.0-alpha.17"
 ```
 
 ### Types
@@ -177,7 +177,7 @@ There are a number of features that can be disabled in this crate. By default, e
 enabled.
 
 ```toml
-activitystreams = { version = "0.5.0-alpha.16", default-features = "false", features = ["derive"] }
+activitystreams = { version = "0.5.0-alpha.17", default-features = "false", features = ["derive"] }
 ```
 
 | feature    | what you get                                              |
diff --git a/activitystreams-derive/Cargo.toml b/activitystreams-derive/Cargo.toml
index 46bf81c..be9dc04 100644
--- a/activitystreams-derive/Cargo.toml
+++ b/activitystreams-derive/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "activitystreams-derive"
 description = "Derive macros for activitystreams"
-version = "0.5.0-alpha.8"
+version = "0.5.0-alpha.9"
 license = "GPL-3.0"
 authors = ["asonix <asonix.dev@gmail.com>"]
 repository = "https://git.asonix.dog/Aardwolf/activitystreams"
diff --git a/activitystreams-derive/README.md b/activitystreams-derive/README.md
index 550907b..2404f2c 100644
--- a/activitystreams-derive/README.md
+++ b/activitystreams-derive/README.md
@@ -10,7 +10,7 @@ Add the required crates to your `Cargo.toml`
 ```toml
 # Cargo.toml
 
-activitystreams = "0.5.0-alpha.16"
+activitystreams = "0.5.0-alpha.17"
 serde = { version = "1.0", features = ["derive"] }
 ```
 
diff --git a/activitystreams-derive/src/lib.rs b/activitystreams-derive/src/lib.rs
index 7a70fda..7d382d4 100644
--- a/activitystreams-derive/src/lib.rs
+++ b/activitystreams-derive/src/lib.rs
@@ -23,8 +23,8 @@
 //!
 //! First, add `serde` and `activitystreams-derive` to your Cargo.toml
 //! ```toml
-//! activitystreams-derive = "0.5.0-alpha.8"
-//! # or activitystreams = "0.5.0-alpha.16"
+//! activitystreams-derive = "0.5.0-alpha.9"
+//! # or activitystreams = "0.5.0-alpha.17"
 //! serde = { version = "1.0", features = ["derive"] }
 //! ```
 //!
@@ -269,49 +269,11 @@ pub fn ref_derive(input: TokenStream) -> TokenStream {
                     }
                 }
 
-                impl<U> AsRef<#ty> for Ext<#name, U>
-                where
-                    U: std::fmt::Debug,
-                {
-                    fn as_ref(&self) -> &#ty {
-                        self.base.as_ref()
-                    }
-                }
-
-                impl<U, V> AsRef<#ty> for Ext<Ext<#name, U>, V>
-                where
-                    U: std::fmt::Debug,
-                    V: std::fmt::Debug,
-                {
-                    fn as_ref(&self) -> &#ty {
-                        self.base.as_ref()
-                    }
-                }
-
                 impl AsMut<#ty> for #name {
                     fn as_mut(&mut self) -> &mut #ty {
                         &mut self.#ident
                     }
                 }
-
-                impl<U> AsMut<#ty> for Ext<#name, U>
-                where
-                    U: std::fmt::Debug,
-                {
-                    fn as_mut(&mut self) -> &mut #ty {
-                        self.base.as_mut()
-                    }
-                }
-
-                impl<U, V> AsMut<#ty> for Ext<Ext<#name, U>, V>
-                where
-                    U: std::fmt::Debug,
-                    V: std::fmt::Debug,
-                {
-                    fn as_mut(&mut self) -> &mut #ty {
-                        self.base.as_mut()
-                    }
-                }
             }
         })
         .collect();
diff --git a/src/ext.rs b/src/ext.rs
index 3454f00..2101ec4 100644
--- a/src/ext.rs
+++ b/src/ext.rs
@@ -126,10 +126,9 @@ use std::{convert::TryFrom, fmt::Debug};
 /// For example, the type `Ext<Video, HashMap<String, String>>` will implement the `Object` trait,
 /// because `Video` implements that trait.
 ///
-/// Additionally, some level of AsRef and AsMut have been derived for Ext. If type type
+/// Additionally, AsRef and AsMut have been implemented for Ext. If type type
 /// `Ext<Ext<Follow, SomeTime>, AnotherType>` exists, that will implement
-/// `AsRef<ActivityProperties>` just like the innermost `Follow`. This only works for types
-/// two levels deep, however.
+/// `AsRef<ActivityProperties>` just like the innermost `Follow`.
 ///
 /// Usage:
 /// ```rust
@@ -204,6 +203,26 @@ pub trait Extensible<U> {
         Self: Sized;
 }
 
+impl<T, U, V> AsRef<V> for Ext<T, U>
+where
+    T: Base + AsRef<V>,
+    U: Extension<T> + Debug,
+{
+    fn as_ref(&self) -> &V {
+        self.base.as_ref()
+    }
+}
+
+impl<T, U, V> AsMut<V> for Ext<T, U>
+where
+    T: Base + AsMut<V>,
+    U: Extension<T> + Debug,
+{
+    fn as_mut(&mut self) -> &mut V {
+        self.base.as_mut()
+    }
+}
+
 impl<T, U> TryFrom<Ext<T, U>> for BaseBox
 where
     T: Base + serde::ser::Serialize,
diff --git a/src/lib.rs b/src/lib.rs
index 2a0ffb4..2c46333 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -25,7 +25,7 @@
 //!
 //! First, add ActivityStreams to your dependencies
 //! ```toml
-//! activitystreams = "0.5.0-alpha.16"
+//! activitystreams = "0.5.0-alpha.17"
 //! ```
 //!
 //! ### Types
@@ -209,7 +209,7 @@
 //! enabled.
 //!
 //! ```toml
-//! activitystreams = { version = "0.5.0-alpha.16", default-features = "false", features = ["derive"] }
+//! activitystreams = { version = "0.5.0-alpha.17", default-features = "false", features = ["derive"] }
 //! ```
 //!
 //! | feature    | what you get                                              |
diff --git a/src/link/types.rs b/src/link/types.rs
index df8d128..4661acb 100644
--- a/src/link/types.rs
+++ b/src/link/types.rs
@@ -18,7 +18,6 @@
  */
 
 use crate::{
-    ext::Ext,
     link::{kind::*, properties::*, Link, LinkBox},
     Base, BaseBox, PropRefs,
 };