diff --git a/Sources/Punchnet/SDLContext.swift b/Sources/Punchnet/SDLContext.swift
index 9c18cd1..da865dc 100644
--- a/Sources/Punchnet/SDLContext.swift
+++ b/Sources/Punchnet/SDLContext.swift
@@ -79,7 +79,7 @@ public class SDLContext: @unchecked Sendable {
     private var flowTracer = SDLFlowTracerActor()
     private var flowTracerCancel: AnyCancellable?
     
-    public init(provider: NEPacketTunnelProvider, config: SDLConfiguration, rsaCipher: RSACipher, aesCipher: AESCipher) throws {
+    public init(provider: NEPacketTunnelProvider, config: SDLConfiguration, rsaCipher: RSACipher, aesCipher: AESCipher) {
         self.config = config
         self.rsaCipher = rsaCipher
         self.aesCipher = aesCipher
diff --git a/Sources/Punchnet/SDLQPSCounter.swift b/Sources/Punchnet/SDLQPSCounter.swift
index 57311fd..9af58fd 100644
--- a/Sources/Punchnet/SDLQPSCounter.swift
+++ b/Sources/Punchnet/SDLQPSCounter.swift
@@ -8,14 +8,15 @@
 import Foundation
 
 // 计数器，用来统计qps
-class SDLQPSCounter {
+class SDLQPSCounter: @unchecked Sendable {
     private var count = 0
     private let timer: DispatchSourceTimer
     private let label: String
+    private let queue = DispatchQueue(label: "com.punchnet.qps")
     
     init(label: String) {
         self.label = label
-        timer = DispatchSource.makeTimerSource(queue: DispatchQueue(label: "com.yourapp.qps"))
+        timer = DispatchSource.makeTimerSource(queue: queue)
         timer.schedule(deadline: .now(), repeating: .seconds(1), leeway: .milliseconds(100))
         timer.setEventHandler { [weak self] in
             guard let self = self else { return }
@@ -26,7 +27,7 @@ class SDLQPSCounter {
     }
     
     func increment(num: Int = 1) {
-        DispatchQueue(label: "com.yourapp.qps").async {
+        queue.async {
             self.count += num
         }
     }