diff --git a/Sources/Punchnet/SDLSuperClient.swift b/Sources/Punchnet/SDLSuperClient.swift
index 350de99..4688351 100644
--- a/Sources/Punchnet/SDLSuperClient.swift
+++ b/Sources/Punchnet/SDLSuperClient.swift
@@ -98,13 +98,16 @@ actor SDLSuperClient {
                 }
                 
                 // --MARK: 心跳机制
-//                group.addTask {
-//                    while !Task.isCancelled {
-//                        await self.ping()
-//                        try await Task.sleep(nanoseconds: 5 * 1_000_000_000)
-//                    }
-//                    NSLog("[SDLSuperClient] heartbeat cancelled")
-//                }
+                group.addTask {
+                    while true {
+                        try Task.checkCancellation()
+                        await self.ping()
+                        try Task.checkCancellation()
+                        try await Task.sleep(nanoseconds: 5 * 1_000_000_000)
+                        try Task.checkCancellation()
+                    }
+                    NSLog("[SDLSuperClient] heartbeat cancelled")
+                }
                 
                 try await group.waitForAll()
                 NSLog("[SDLSuperClient] group closed")