diff --git a/fasthttpproxy/http.go b/fasthttpproxy/http.go
index b814a4ccd5..9dd5a255be 100644
--- a/fasthttpproxy/http.go
+++ b/fasthttpproxy/http.go
@@ -34,9 +34,9 @@ func FasthttpHTTPDialer(proxy string) fasthttp.DialFunc {
 func FasthttpHTTPDialerTimeout(proxy string, timeout time.Duration) fasthttp.DialFunc {
 	var auth string
 	if strings.Contains(proxy, "@") {
-		split := strings.Split(proxy, "@")
-		auth = base64.StdEncoding.EncodeToString([]byte(split[0]))
-		proxy = split[1]
+		index := strings.LastIndex(proxy, "@")
+		auth = base64.StdEncoding.EncodeToString([]byte(proxy[:index]))
+		proxy = proxy[index+1:]
 	}
 
 	return func(addr string) (net.Conn, error) {