diff --git a/contracts/agent-vault/src/lib.rs b/contracts/agent-vault/src/lib.rs
index f1d0ecf..bf9a61f 100644
--- a/contracts/agent-vault/src/lib.rs
+++ b/contracts/agent-vault/src/lib.rs
@@ -46,6 +46,14 @@ pub struct RegOrchEvent {
     pub orchestrator: Address,
 }
 
+#[contractevent]
+pub struct UpdateOrchEvent {
+    #[topic]
+    pub user: Address,
+    pub old_orchestrator: Address,
+    pub new_orchestrator: Address,
+}
+
 #[contractevent]
 pub struct TaskNewEvent {
     #[topic]