diff --git a/server/packages/sandbox-agent/src/router.rs b/server/packages/sandbox-agent/src/router.rs
index 36feb4c..1a0c96e 100644
--- a/server/packages/sandbox-agent/src/router.rs
+++ b/server/packages/sandbox-agent/src/router.rs
@@ -182,6 +182,7 @@ pub async fn shutdown_servers(state: &Arc<AppState>) {
             SessionEndedData,
             SessionEndReason,
             TerminatedBy,
+            StderrOutput,
             ItemEventData,
             ItemDeltaData,
             UniversalItem,