diff --git a/proto/psh.proto b/proto/psh.proto
index 2439fc7..0529ea1 100644
--- a/proto/psh.proto
+++ b/proto/psh.proto
@@ -16,7 +16,17 @@ service PshService {
 message Unit {}
 message GetTaskReq { string instance_id = 1; }
 message GetTaskResp { optional Task task = 1; }
-message TaskDoneReq { string task_id = 1; }
+message TaskDoneReq {
+  string task_id = 1;
+  TaskStatus status = 2;
+
+  enum TaskStatus {
+    Ok = 0;
+    NotFound = 1;
+    AccessDeined = 2;
+    BadBuildId = 3;
+  }
+}
 message NewInstanceIdResp { string instance_id = 1; }
 
 message HeartbeatReq {
@@ -53,6 +63,12 @@ message Task {
   oneof task_type {
     WasmTask wasm = 3;
     ProfilingTask profiling = 4;
+    UploadElfTask upload_elf = 5;
+  }
+
+  message UploadElfTask {
+    string filename = 1;
+    optional string build_id = 2;
   }
 
   message WasmTask {