diff --git a/Cargo.lock b/Cargo.lock
index 4732bb6..ee6e375 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2017,9 +2017,9 @@ dependencies = [
 
 [[package]]
 name = "k-ap"
-version = "0.4.0"
+version = "0.4.4"
 source = "sparse+https://git.gabrielkaszewski.dev/api/packages/GKaszewski/cargo/"
-checksum = "ccaa914953bfd45ea206e11826da8f61ce1fbe02f8fe0622880527046ad6ae24"
+checksum = "daec6ce514e07fc9c6e39a780f3144292534008a2c16c1645f131fad877c7894"
 dependencies = [
  "activitypub_federation",
  "anyhow",
@@ -4570,7 +4570,7 @@ version = "0.1.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c2a7b1c03c876122aa43f3020e6c3c3ee5c05081c9a00739faf7503aeba10d22"
 dependencies = [
- "windows-sys 0.61.2",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
diff --git a/crates/adapters/activitypub/Cargo.toml b/crates/adapters/activitypub/Cargo.toml
index 8497b71..d2abb7f 100644
--- a/crates/adapters/activitypub/Cargo.toml
+++ b/crates/adapters/activitypub/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
-k-ap = { version = "0.4.0", registry = "gitea" }
+k-ap = { version = "0.4.4", registry = "gitea" }
 domain = { workspace = true }
 url = { workspace = true }
 serde = { workspace = true }
diff --git a/crates/adapters/event-payload/src/lib.rs b/crates/adapters/event-payload/src/lib.rs
index c719659..9ab789f 100644
--- a/crates/adapters/event-payload/src/lib.rs
+++ b/crates/adapters/event-payload/src/lib.rs
@@ -97,6 +97,11 @@ pub enum EventPayload {
         owner_user_id: String,
         follower_inbox_url: String,
     },
+    FederationOutboundFollowAccepted {
+        local_user_id: String,
+        remote_actor_url: String,
+        outbox_url: Option<String>,
+    },
 }
 
 impl EventPayload {
@@ -124,6 +129,7 @@ impl EventPayload {
             Self::MentionReceived { .. } => "mentions.received",
             Self::FederationDeliveryRequested { .. } => "federation.delivery.requested",
             Self::FederationBackfillRequested { .. } => "federation.backfill.requested",
+            Self::FederationOutboundFollowAccepted { .. } => "federation.outbound_follow.accepted",
         }
     }
 }
@@ -421,7 +427,8 @@ impl TryFrom<EventPayload> for DomainEvent {
                 author_user_id: UserId::from_uuid(parse_uuid(&author_user_id, "author_user_id")?),
             },
             EventPayload::FederationDeliveryRequested { .. }
-            | EventPayload::FederationBackfillRequested { .. } => {
+            | EventPayload::FederationBackfillRequested { .. }
+            | EventPayload::FederationOutboundFollowAccepted { .. } => {
                 return Err(DomainError::Internal(
                     "federation infrastructure event — not a domain event".into(),
                 ));
diff --git a/crates/adapters/postgres-federation/Cargo.toml b/crates/adapters/postgres-federation/Cargo.toml
index 179de97..8abfa69 100644
--- a/crates/adapters/postgres-federation/Cargo.toml
+++ b/crates/adapters/postgres-federation/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
-k-ap = { version = "0.4.0", registry = "gitea" }
+k-ap = { version = "0.4.4", registry = "gitea" }
 sqlx = { workspace = true }
 uuid = { workspace = true }
 chrono = { workspace = true }
diff --git a/crates/bootstrap/Cargo.toml b/crates/bootstrap/Cargo.toml
index 963a3f7..add8b39 100644
--- a/crates/bootstrap/Cargo.toml
+++ b/crates/bootstrap/Cargo.toml
@@ -14,7 +14,7 @@ postgres = { workspace = true }
 postgres-search = { workspace = true }
 postgres-federation = { workspace = true }
 activitypub = { workspace = true }
-k-ap = { version = "0.4.0", registry = "gitea" }
+k-ap = { version = "0.4.4", registry = "gitea" }
 serde_json = { workspace = true }
 anyhow = { workspace = true }
 nats = { workspace = true }
diff --git a/crates/bootstrap/src/factory.rs b/crates/bootstrap/src/factory.rs
index 35e7085..67c764f 100644
--- a/crates/bootstrap/src/factory.rs
+++ b/crates/bootstrap/src/factory.rs
@@ -70,6 +70,20 @@ impl k_ap::data::EventPublisher for KapPublisher {
                     follower_inbox_url,
                 })?,
             ),
+            FederationEvent::OutboundFollowAccepted {
+                local_user_id,
+                remote_actor_url,
+                outbox_url,
+            } => (
+                "federation.outbound_follow.accepted",
+                serde_json::to_vec(
+                    &event_payload::EventPayload::FederationOutboundFollowAccepted {
+                        local_user_id: local_user_id.to_string(),
+                        remote_actor_url,
+                        outbox_url,
+                    },
+                )?,
+            ),
             FederationEvent::DeliveryFailed { inbox, error, .. } => {
                 tracing::warn!(%inbox, %error, "AP delivery failed permanently");
                 return Ok(());
diff --git a/crates/worker/Cargo.toml b/crates/worker/Cargo.toml
index 4cfd9b1..bb77b8d 100644
--- a/crates/worker/Cargo.toml
+++ b/crates/worker/Cargo.toml
@@ -13,7 +13,7 @@ application = { workspace = true }
 nats = { workspace = true }
 event-transport = { workspace = true }
 event-payload = { workspace = true }
-k-ap = { version = "0.4.0", registry = "gitea" }
+k-ap = { version = "0.4.4", registry = "gitea" }
 activitypub = { workspace = true }
 postgres = { workspace = true }
 postgres-federation = { workspace = true }
diff --git a/crates/worker/src/main.rs b/crates/worker/src/main.rs
index a67afe9..1815c04 100644
--- a/crates/worker/src/main.rs
+++ b/crates/worker/src/main.rs
@@ -104,6 +104,22 @@ async fn main() {
                         .await;
                         result
                     }
+                    EventPayload::FederationOutboundFollowAccepted {
+                        remote_actor_url,
+                        outbox_url,
+                        ..
+                    } => {
+                        if let Some(outbox) = outbox_url {
+                            infra
+                                .raw_ap_service
+                                .import_remote_outbox(&outbox, &remote_actor_url)
+                                .await
+                                .map_err(|e| DomainError::Internal(e.to_string()))
+                        } else {
+                            tracing::info!(%remote_actor_url, "outbound follow accepted but no outbox URL — skipping backfill");
+                            Ok(())
+                        }
+                    }
 
                     // ── domain events ──────────────────────────────────────
                     p => match DomainEvent::try_from(p) {