diff --git a/Server/src/server.cpp b/Server/src/server.cpp
index 4515379..8111694 100644
--- a/Server/src/server.cpp
+++ b/Server/src/server.cpp
@@ -16,9 +16,9 @@ int main() {
     auto config = Chattr::ConfigManager::load();
     Chattr::log::setDefaultLogger(config.logLevel, config.logFileName, config.logfileSize, config.logfileCount);
 
-    struct Chattr::TCPSocket sock;
+    Chattr::TCPSocket sock;
     struct Chattr::Address serveraddr;
-    struct Chattr::TCPSocket clientSock;
+    Chattr::TCPSocket clientSock;
     struct Chattr::Address clientAddr;
     if (config.ipVersion == 4) {
         sock.init(AF_INET);
@@ -59,7 +59,7 @@ int main() {
         spdlog::info("Waiting for connection...");
         sock.accept(clientSock, clientAddr);
 
-        threadPool.enqueueJob(_TCPClient, std::move(clientSock), clientAddr);
+        // threadPool.enqueueJob(_TCPClient, std::move(clientSock), clientAddr);
 
         Chattr::Thread thread_(_TCPClient, std::move(clientSock), clientAddr);
         thread_.detach();
diff --git a/impl/Utils/Thread.cpp b/impl/Utils/Thread.cpp
index 147753e..7fbb60b 100644
--- a/impl/Utils/Thread.cpp
+++ b/impl/Utils/Thread.cpp
@@ -16,15 +16,8 @@ Thread::~Thread() {
 		spdlog::critical("There is not joined thread");
 		std::exit(EXIT_FAILURE);
 	}
-}
-
-void* Thread::join() {
-#ifdef _WIN32
-	WaitForSingleObject(handle_, INFINITE);
-#elif __linux__
-	pthread_join(handle_, returnValue);
-#endif
-	return returnValue;
+	if (returnValuePtr != nullptr)
+		delete returnValuePtr;
 }
 
 void Thread::detach() {
diff --git a/impl/Utils/ThreadPool.cpp b/impl/Utils/ThreadPool.cpp
index 1f1a449..f573fc2 100644
--- a/impl/Utils/ThreadPool.cpp
+++ b/impl/Utils/ThreadPool.cpp
@@ -7,7 +7,7 @@ ThreadPool::ThreadPool(std::uint32_t numThreads) {
 	workers_.reserve(numThreads);
 
 	while (numThreads--)
-		workers_.push_back([this]() -> void* { return this->Worker(); });
+		workers_.push_back([this]() -> int { this->Worker(); return 1; });
 }
 
 ThreadPool::~ThreadPool() {
@@ -24,7 +24,6 @@ void* ThreadPool::Worker() {
 #elif __linux__
 	pid_t pid = getpid();
 #endif
-	spdlog::info("ThreadPool Worker : {}", pid);
 	while (!terminate_) {
 		std::unique_lock<std::mutex> lock(jobQueueMutex);
 		spdlog::info("ThreadPool Worker : {} Waiting for a job", pid);
diff --git a/include/Utils/Thread.hpp b/include/Utils/Thread.hpp
index 9434f5a..b6e3442 100644
--- a/include/Utils/Thread.hpp
+++ b/include/Utils/Thread.hpp
@@ -23,7 +23,7 @@ public:
     }
 #elif __linux__
     static void* thread_func(void *param) {
-        auto task = static_cast<std::function<void* ()>*>(param);
+        auto task = static_cast<std::function<void()>*>(param);
         (*task)();
         delete task;
         return 0;
@@ -36,15 +36,11 @@ public:
     Thread& operator=(Thread&) = delete;
 
     template<typename _Callable, typename... _Args>
-        requires (!std::is_same_v<std::decay_t<_Callable>, Thread>)
+        requires (!std::is_same_v<std::decay_t<_Callable>, Thread>) &&
+            (!std::is_void_v<std::invoke_result_t<_Callable, _Args...>>)
     Thread(_Callable&& __f, _Args&&... __args) {
         auto boundFunc = [this, __f = std::move(__f), ... __args = std::move(__args)]() mutable {
-            if constexpr (!std::is_void_v<std::invoke_result_t<decltype(__f), decltype(__args)...>>) {
-                returnValue = __f(std::move(__args)...);
-            }
-            else {
-                __f(std::move(__args)...); // void 반환은 저장하지 않음
-            }
+            returnValuePtr = new std::invoke_result_t<_Callable, _Args...>(__f(std::move(__args)...));
         };
         std::function<void()> funcPtr = std::move(boundFunc);
 #ifdef _WIN32
@@ -53,9 +49,39 @@ public:
         pthread_create(&handle_, NULL, thread_func, funcPtr);
 #endif
     }
+    /*template<typename _Callable, typename... _Args>
+        requires (!std::is_same_v<std::decay_t<_Callable>, Thread>) &&
+            std::is_void_v<std::invoke_result_t<_Callable, _Args...>>
+    Thread(_Callable&& __f, _Args&&... __args) {
+        auto boundFunc = [this, __f = std::move(__f), ... __args = std::move(__args)]() mutable {
+            __f(std::move(__args)...);
+        };
+        std::function<void()> funcPtr = std::move(boundFunc);
+#ifdef _WIN32
+        handle_ = (HANDLE)_beginthreadex(nullptr, 0, thread_func, new std::function<void()>(std::move(funcPtr)), 0, nullptr);
+#elif __linux__
+        pthread_create(&handle_, NULL, thread_func, funcPtr);
+#endif
+    }*/
     ~Thread();
 
-    void* join();
+    void join() {
+#ifdef _WIN32
+        WaitForSingleObject(handle_, INFINITE);
+#elif __linux__
+        pthread_join(handle_, returnValue);
+#endif
+    }
+    template<typename _RetType>
+        requires (!std::is_void_v<_RetType>)
+    _RetType join() {
+#ifdef _WIN32
+        WaitForSingleObject(handle_, INFINITE);
+#elif __linux__
+        pthread_join(handle_, returnValue);
+#endif
+        return *static_cast<_RetType *>(returnValuePtr);
+    }
     void detach();
 
 private:
@@ -64,7 +90,7 @@ private:
 #elif __linux__
     pthread_t handle_;
 #endif
-    void* returnValue = nullptr;
+    void* returnValuePtr = nullptr;
     bool detached = false;
 };