diff --git a/Cargo.lock b/Cargo.lock
index f42fb286..462422fb 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3102,7 +3102,6 @@ dependencies = [
 name = "plume-common"
 version = "0.7.1-dev"
 dependencies = [
- "activitypub",
  "activitystreams",
  "activitystreams-derive",
  "activitystreams-traits",
diff --git a/plume-common/Cargo.toml b/plume-common/Cargo.toml
index e8a07660..db5dec5e 100644
--- a/plume-common/Cargo.toml
+++ b/plume-common/Cargo.toml
@@ -5,7 +5,6 @@ authors = ["Plume contributors"]
 edition = "2018"
 
 [dependencies]
-activitypub = "0.1.1"
 activitystreams-derive = "0.1.1"
 activitystreams-traits = "0.1.0"
 array_tool = "1.0"
diff --git a/plume-common/src/activity_pub/inbox.rs b/plume-common/src/activity_pub/inbox.rs
index 48ba6c5f..fca99e4c 100644
--- a/plume-common/src/activity_pub/inbox.rs
+++ b/plume-common/src/activity_pub/inbox.rs
@@ -200,7 +200,7 @@ where
     pub fn with<A, V, M>(self, proxy: Option<&reqwest::Proxy>) -> Inbox<'a, C, E, R>
     where
         A: AsActor<&'a C> + FromId<C, Error = E>,
-        V: activitypub::Activity,
+        V: serde::de::DeserializeOwned + serde::Serialize,
         M: AsObject<A, V, &'a C, Error = E> + FromId<C, Error = E>,
         M::Output: Into<R>,
     {
@@ -333,7 +333,7 @@ pub trait FromId<C>: Sized {
     type Error: From<InboxError<Self::Error>> + Debug;
 
     /// The ActivityPub object type representing Self
-    type Object: activitypub::Object;
+    type Object: serde::de::DeserializeOwned + serde::Serialize;
 
     /// Tries to get an instance of `Self` from an ActivityPub ID.
     ///
@@ -521,7 +521,7 @@ pub trait AsActor<C> {
 /// ```
 pub trait AsObject<A, V, C>
 where
-    V: activitypub::Activity,
+    V: serde::de::DeserializeOwned + serde::Serialize,
 {
     /// What kind of error is returned when something fails
     type Error;
diff --git a/plume-common/src/activity_pub/mod.rs b/plume-common/src/activity_pub/mod.rs
index 23b2b5f4..bdc375e5 100644
--- a/plume-common/src/activity_pub/mod.rs
+++ b/plume-common/src/activity_pub/mod.rs
@@ -1,4 +1,4 @@
-use activitypub::{Activity, Link, Object};
+use activitystreams::{activity::Activity, object::ApObject};
 use array_tool::vec::Uniq;
 use reqwest::{header::HeaderValue, r#async::ClientBuilder, Url};
 use rocket::{
@@ -57,13 +57,13 @@ pub fn context() -> serde_json::Value {
 
 pub struct ActivityStream<T>(T);
 
-impl<T> ActivityStream<T> {
-    pub fn new(t: T) -> ActivityStream<T> {
+impl<O: serde::Serialize> ActivityStream<ApObject<O>> {
+    pub fn new(t: ApObject<O>) -> ActivityStream<ApObject<O>> {
         ActivityStream(t)
     }
 }
 
-impl<'r, O: Object> Responder<'r> for ActivityStream<O> {
+impl<'r, O: serde::Serialize> Responder<'r> for ActivityStream<ApObject<O>> {
     fn respond_to(self, request: &Request<'_>) -> Result<Response<'r>, Status> {
         let mut json = serde_json::to_value(&self.0).map_err(|_| Status::InternalServerError)?;
         json["@context"] = context();
@@ -108,10 +108,14 @@ impl<'a, 'r> FromRequest<'a, 'r> for ApRequest {
             .unwrap_or(Outcome::Forward(()))
     }
 }
-pub fn broadcast<S, A, T, C>(sender: &S, act: A, to: Vec<T>, proxy: Option<reqwest::Proxy>)
-where
+pub fn broadcast<S, A, T, C>(
+    sender: &S,
+    act: Activity<A>,
+    to: Vec<T>,
+    proxy: Option<reqwest::Proxy>,
+) where
     S: sign::Signer,
-    A: Activity,
+    A: serde::Serialize,
     T: inbox::AsActor<C>,
 {
     let boxes = to
@@ -204,8 +208,6 @@ pub trait IntoId {
     fn into_id(self) -> Id;
 }
 
-impl Link for Id {}
-
 #[derive(Clone, Debug, Default, Deserialize, Serialize, Properties)]
 #[serde(rename_all = "camelCase")]
 pub struct ApSignature {
@@ -251,13 +253,9 @@ pub struct Source {
     pub content: String,
 }
 
-impl Object for Source {}
-
 #[derive(Clone, Debug, Default, Deserialize, Serialize, Properties)]
 #[serde(rename_all = "camelCase")]
 pub struct Licensed {
     #[activitystreams(concrete(String), functional)]
     pub license: Option<serde_json::Value>,
 }
-
-impl Object for Licensed {}