diff --git a/plume-models/src/posts.rs b/plume-models/src/posts.rs
index 37de0777..981462dd 100644
--- a/plume-models/src/posts.rs
+++ b/plume-models/src/posts.rs
@@ -10,7 +10,7 @@ use activitypub::{
     CustomObject,
 };
 use activitystreams::{
-    activity::Create as Create07,
+    activity::{Create as Create07, Update as Update07},
     base::{AnyBase, Base},
     iri_string::types::IriString,
     object::{ApObject, Article as Article07, Image as Image07},
@@ -539,6 +539,22 @@ impl Post {
         Ok(act)
     }
 
+    pub fn update_activity07(&self, conn: &Connection) -> Result<Update07> {
+        let article = self.to_activity07(conn)?;
+        let to = article.to().ok_or(Error::MissingApProperty)?.clone();
+        let cc = article.cc().ok_or(Error::MissingApProperty)?.clone();
+        let mut act = Update07::new(
+            self.get_authors(conn)?[0].ap_url.parse::<IriString>()?,
+            Base::retract(article)?.into_generic()?,
+        );
+        act.set_id(
+            format!("{}/update-{}", self.ap_url, Utc::now().timestamp()).parse::<IriString>()?,
+        );
+        act.set_many_tos(to);
+        act.set_many_ccs(cc);
+        Ok(act)
+    }
+
     pub fn update_mentions(&self, conn: &Connection, mentions: Vec<link::Mention>) -> Result<()> {
         let mentions = mentions
             .into_iter()