diff --git a/server/main.go b/server/main.go
index 2be21c0..fda01c8 100644
--- a/server/main.go
+++ b/server/main.go
@@ -14,7 +14,7 @@ import (
 )
 
 var (
-	version = "2.0.3"
+	version = "2.0.4"
 
 	// cmd line options
 	configFile *string
diff --git a/server/proxy/proxy.go b/server/proxy/proxy.go
index 1001f4a..394b43b 100644
--- a/server/proxy/proxy.go
+++ b/server/proxy/proxy.go
@@ -283,8 +283,12 @@ func (p *Proxy) handleNotification(notif []byte) {
 }
 
 func (p *Proxy) connect(minerName string) error {
-	// p.connMu.Lock()
-	// defer p.connMu.Unlock()
+	p.connMu.Lock()
+	defer p.connMu.Unlock()
+
+	if p.isClosed {
+		return errors.New("using closed proxy error")
+	}
 
 	var conn net.Conn
 	var socks5Dialer proxy.Dialer
diff --git a/server/tcp/server.go b/server/tcp/server.go
index 4a12555..9f9211e 100644
--- a/server/tcp/server.go
+++ b/server/tcp/server.go
@@ -47,7 +47,7 @@ func StartServer() {
 		if err != nil {
 			logger.Get().Println("Unable to accept connection: ", err)
 		}
-		conn.SetReadDeadline(time.Now().Add(45 * time.Second))
+		conn.SetReadDeadline(time.Now().Add(90 * time.Second))
 
 		// if !limit.Allow() {
 		// 	logger.Get().Println("Out of rate limit:", rl, "per 25 ms.")