diff --git a/Cargo.toml b/Cargo.toml
index e51ef59..ef047b6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "activitystreams"
 description = "Activity Streams in Rust"
-version = "0.5.0-alpha.12"
+version = "0.5.0-alpha.13"
 license = "GPL-3.0"
 authors = ["asonix <asonix@asonix.dog>"]
 repository = "https://git.asonix.dog/Aardwolf/activitystreams"
diff --git a/README.md b/README.md
index 440f6fe..1c33826 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.12"
+activitystreams = "0.5.0-alpha.13"
 ```
 
 ### 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.12", default-features = "false", features = ["derive"] }
+activitystreams = { version = "0.5.0-alpha.13", default-features = "false", features = ["derive"] }
 ```
 
 | feature    | what you get                                              |
diff --git a/src/collection/properties.rs b/src/collection/properties.rs
index 8fb2acf..e103e12 100644
--- a/src/collection/properties.rs
+++ b/src/collection/properties.rs
@@ -25,7 +25,7 @@
 //! use activitystreams::{
 //!     collection::{
 //!         properties::CollectionProperties,
-//!         Collection, CollectionBox,
+//!         Collection,
 //!     },
 //!     ext::Ext,
 //!     object::{
@@ -67,13 +67,7 @@
 //! # fn main() {}
 //! ```
 
-use crate::{
-    collection::{CollectionBox, CollectionPageBox},
-    link::LinkBox,
-    object::ObjectBox,
-    primitives::*,
-    properties,
-};
+use crate::{primitives::*, properties, BaseBox};
 
 properties! {
     Collection {
@@ -96,8 +90,7 @@ properties! {
             ],
             types [
                 XsdString,
-                ObjectBox,
-                LinkBox,
+                BaseBox,
             ],
             required,
         },
@@ -129,8 +122,7 @@ properties! {
             ],
             types [
                 XsdAnyUri,
-                LinkBox,
-                CollectionPageBox,
+                BaseBox,
             ],
             functional,
         },
@@ -144,8 +136,7 @@ properties! {
             ],
             types [
                 XsdAnyUri,
-                LinkBox,
-                CollectionPageBox,
+                BaseBox,
             ],
             functional,
         },
@@ -159,8 +150,7 @@ properties! {
             ],
             types [
                 XsdAnyUri,
-                LinkBox,
-                CollectionPageBox,
+                BaseBox,
             ],
         },
     }
@@ -182,8 +172,7 @@ properties! {
             ],
             types [
                 XsdAnyUri,
-                LinkBox,
-                CollectionBox,
+                BaseBox,
             ],
             functional,
         },
@@ -197,8 +186,7 @@ properties! {
             ],
             types [
                 XsdAnyUri,
-                LinkBox,
-                CollectionPageBox,
+                BaseBox,
             ],
             functional,
         },
@@ -212,8 +200,7 @@ properties! {
             ],
             types [
                 XsdAnyUri,
-                LinkBox,
-                CollectionPageBox,
+                BaseBox,
             ],
             functional,
         },
diff --git a/src/lib.rs b/src/lib.rs
index 137fc31..14c2cbc 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.12"
+//! activitystreams = "0.5.0-alpha.13"
 //! ```
 //!
 //! ### Types
@@ -209,7 +209,7 @@
 //! enabled.
 //!
 //! ```toml
-//! activitystreams = { version = "0.5.0-alpha.12", default-features = "false", features = ["derive"] }
+//! activitystreams = { version = "0.5.0-alpha.13", default-features = "false", features = ["derive"] }
 //! ```
 //!
 //! | feature    | what you get                                              |