diff --git a/source/_posts/quick-start-akka.md b/source/_posts/quick-start-akka.md
index bc8a2f0..0aa61b6 100644
--- a/source/_posts/quick-start-akka.md
+++ b/source/_posts/quick-start-akka.md
@@ -47,7 +47,7 @@ public interface Command {}
 
 public class Request<T> implements Command {
     private T payload;
-    private ActorOf<Command> sender;
+    private ActorRef<Command> sender;
 
     // getter和setter先省略了
 }