diff --git a/Tun/Punchnet/Concurrency/PeriodicWorker.swift b/Tun/Punchnet/Concurrency/PeriodicWorker.swift
index 2398a21..7e83a0c 100644
--- a/Tun/Punchnet/Concurrency/PeriodicWorker.swift
+++ b/Tun/Punchnet/Concurrency/PeriodicWorker.swift
@@ -132,13 +132,14 @@ public actor PeriodicWorker {
     }
 
     private static func runFixedRate(configuration: Configuration, operation: @escaping Operation, onError: @escaping ErrorHandler) async {
-        var nextRun = ContinuousClock.now
+        let clock = ContinuousClock()
+        var nextRun = clock.now
         if !configuration.runImmediately {
             nextRun = nextRun.advanced(by: configuration.interval)
         }
 
         while !Task.isCancelled {
-            let now = ContinuousClock.now
+            let now = clock.now
             if nextRun > now {
                 let delay = now.duration(to: nextRun)
                 guard await sleep(interval: delay, tolerance: configuration.tolerance) else {
@@ -155,7 +156,7 @@ public actor PeriodicWorker {
                 return
             }
 
-            let afterRun = ContinuousClock.now
+            let afterRun = clock.now
             repeat {
                 nextRun = nextRun.advanced(by: configuration.interval)
             } while nextRun <= afterRun
diff --git a/Tun/Punchnet/Context/SDLContextActor.swift b/Tun/Punchnet/Context/SDLContextActor.swift
index 8379f48..6cf2788 100644
--- a/Tun/Punchnet/Context/SDLContextActor.swift
+++ b/Tun/Punchnet/Context/SDLContextActor.swift
@@ -90,11 +90,11 @@ actor SDLContextActor {
     nonisolated private let provider: NEPacketTunnelProvider
     
     // 处理权限控制
-    private var updatePolicyTask: Task<Void, Never>?
     private let policyService: PolicyService
+    private var updatePolicyWorker: PeriodicWorker?
     
     // stunRequest任务
-    private var stunRequestTask: Task<Void, Never>?
+    private var stunRequestWorker: PeriodicWorker?
 
     public init(provider: NEPacketTunnelProvider, config: SDLConfiguration, rsaCipher: RSACipher) {
         let puncherActor = SDLPuncherActor()
@@ -183,11 +183,11 @@ actor SDLContextActor {
         await self.arpServer.stop()
         await self.sessionManager.clear()
 
-        self.stunRequestTask?.cancel()
-        self.stunRequestTask = nil
+        await self.stunRequestWorker?.stop()
+        self.stunRequestWorker = nil
 
-        self.updatePolicyTask?.cancel()
-        self.updatePolicyTask = nil
+        await self.updatePolicyWorker?.stop()
+        self.updatePolicyWorker = nil
         await self.policyService.clear()
         
         await self.packetOutboundActor.stop()
@@ -349,19 +349,27 @@ extension SDLContextActor {
     
     // 注册成功super的回调函数
     private func whenRegistedSuper() async {
-        self.updatePolicyTask?.cancel()
-        
-        self.updatePolicyTask = Task {
-            do {
-                while true {
-                    try await Task.sleep(for: .seconds(300))
-                    SDLLogger.log("[SDLContext] updatePolicyTask execute")
-                    await self.policyService.updatePolicy(superServiceProxy: self.superServiceProxy)
-                }
-            } catch let err {
+        await self.updatePolicyWorker?.stop()
+        let policyService = self.policyService
+        let superServiceProxy = self.superServiceProxy
+
+        let updatePolicyWorker = PeriodicWorker(
+            configuration: .init(
+                interval: .seconds(300),
+                runImmediately: false,
+                mode: .fixedDelay,
+                errorPolicy: .keepRunning(delay: .seconds(5))
+            ),
+            operation: {
+                SDLLogger.log("[SDLContext] updatePolicyTask execute")
+                await policyService.updatePolicy(superServiceProxy: superServiceProxy)
+            },
+            onError: { err in
                 SDLLogger.log("[SDLContext] updatePolicyTask stop with err: \(err)")
             }
-        }
+        )
+        self.updatePolicyWorker = updatePolicyWorker
+        await updatePolicyWorker.start()
         
         // 启动stun任务
         await self.startStunRequestTask()
@@ -519,23 +527,17 @@ extension SDLContextActor {
     
     // MARK: -- StunRequestTask
     private func startStunRequestTask() async {
-        self.stunRequestTask?.cancel()
-        self.stunRequestTask = nil
+        await self.stunRequestWorker?.stop()
 
-        // 处理心跳逻辑
-        self.stunRequestTask = Task { [weak self] in
-            let timerStream = SDLAsyncTimerStream()
-            timerStream.start(interval: .seconds(8))
-            
-            for await _ in timerStream.stream {
-                if Task.isCancelled {
-                    break
-                }
-                
+        let stunRequestWorker = PeriodicWorker(
+            configuration: .init(
+                interval: .seconds(8),
+                runImmediately: true,
+                mode: .fixedDelay,
+                errorPolicy: .keepRunning(delay: .seconds(5))
+            ),
+            operation: { [weak self] in
                 let probeReply = try? await self?.ipv6AssistClient?.probe(requestTimeout: .seconds(3))
-                if Task.isCancelled {
-                    break
-                }
 
                 if let v6Info = probeReply?.v6Info, let v6Address = SDLUtil.ipv6DataToString(v6Info.v6) {
                     SDLLogger.log("[SDLContext] probe ipv6 address: \(v6Address)")
@@ -543,15 +545,14 @@ extension SDLContextActor {
                     SDLLogger.log("[SDLContext] probe ipv6 address: empty")
                 }
 
-                if Task.isCancelled {
-                    break
-                }
-
                 await self?.sendStunRequest(v6Info: probeReply?.v6Info)
+            },
+            onError: { err in
+                SDLLogger.log("[SDLContext] udp stunRequestTask stop with err: \(err)")
             }
-            
-            SDLLogger.log("[SDLContext] udp stunRequestTask cancel")
-        }
+        )
+        self.stunRequestWorker = stunRequestWorker
+        await stunRequestWorker.start()
     }
     
     private func sendStunRequest(v6Info: SDLV6Info?) async {