diff --git a/Cargo.toml b/Cargo.toml
index cf26826..e51ef59 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "activitystreams"
 description = "Activity Streams in Rust"
-version = "0.5.0-alpha.11"
+version = "0.5.0-alpha.12"
 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.4", path = "activitystreams-derive", optional = true}
+activitystreams-derive = { version = "0.5.0-alpha.5", 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 d651a08..440f6fe 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.11"
+activitystreams = "0.5.0-alpha.12"
 ```
 
 ### 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.11", default-features = "false", features = ["derive"] }
+activitystreams = { version = "0.5.0-alpha.12", default-features = "false", features = ["derive"] }
 ```
 
 | feature    | what you get                                              |
diff --git a/activitystreams-derive/Cargo.toml b/activitystreams-derive/Cargo.toml
index 6f0f91d..b79ea73 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.4"
+version = "0.5.0-alpha.5"
 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 f5f92f4..1d8f46f 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.4"
+activitystreams = "0.5.0-alpha.12"
 serde = { version = "1.0", features = ["derive"] }
 ```
 
diff --git a/activitystreams-derive/src/lib.rs b/activitystreams-derive/src/lib.rs
index df619e8..f93c783 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.4"
-//! # or activitystreams = "0.5.0-alpha.9"
+//! activitystreams-derive = "0.5.0-alpha.5"
+//! # or activitystreams = "0.5.0-alpha.12"
 //! serde = { version = "1.0", features = ["derive"] }
 //! ```
 //!
@@ -239,6 +239,29 @@ pub fn ref_derive(input: TokenStream) -> TokenStream {
                             #box_name::from_concrete(s)
                         }
                     }
+
+                    impl<T> std::convert::TryFrom<Ext<#name, T>> for #box_name
+                    where
+                        T: serde::de::DeserializeOwned + serde::ser::Serialize + std::fmt::Debug,
+                    {
+                        type Error = std::io::Error;
+
+                        fn try_from(s: Ext<#name, T>) -> Result<Self, Self::Error> {
+                            #box_name::from_concrete(s)
+                        }
+                    }
+
+                    impl<T, U> std::convert::TryFrom<Ext<Ext<#name, T>, U>> for #box_name
+                    where
+                        T: serde::de::DeserializeOwned + serde::ser::Serialize + std::fmt::Debug,
+                        U: serde::de::DeserializeOwned + serde::ser::Serialize + std::fmt::Debug,
+                    {
+                        type Error = std::io::Error;
+
+                        fn try_from(s: Ext<Ext<#name, T>, U>) -> Result<Self, Self::Error> {
+                            #box_name::from_concrete(s)
+                        }
+                    }
                 })
             } else {
                 None
diff --git a/src/lib.rs b/src/lib.rs
index fcd0611..137fc31 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.11"
+//! activitystreams = "0.5.0-alpha.12"
 //! ```
 //!
 //! ### Types
@@ -209,7 +209,7 @@
 //! enabled.
 //!
 //! ```toml
-//! activitystreams = { version = "0.5.0-alpha.11", default-features = "false", features = ["derive"] }
+//! activitystreams = { version = "0.5.0-alpha.12", default-features = "false", features = ["derive"] }
 //! ```
 //!
 //! | feature    | what you get                                              |