diff --git a/server.go b/server.go
index 2556086..f2caa39 100644
--- a/server.go
+++ b/server.go
@@ -146,6 +146,17 @@ func isTlsEnabled(fileout ...*string) bool {
 	return true
 }
 
+func registUnhandledPattern(serveMux ServerMuxInterface) {
+	defer func() {
+		recover()
+	}()
+
+	serveMux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		logger.Println("page not found :", r.URL.Path)
+		w.WriteHeader(http.StatusNotFound)
+	})
+}
+
 // NewHTTPServer :
 func NewHTTPServerWithPort(serveMux ServerMuxInterface, port int) *Server {
 	if isTlsEnabled() && port == 80 {
@@ -155,6 +166,7 @@ func NewHTTPServerWithPort(serveMux ServerMuxInterface, port int) *Server {
 	serveMux.HandleFunc(MakeHttpHandlerPattern("welcome"), welcomeHandler)
 	serveMux.HandleFunc(MakeHttpHandlerPattern("lb_health_chceck"), healthCheckHandler)
 	serveMux.HandleFunc(MakeHttpHandlerPattern("lb_health_check"), healthCheckHandler)
+	registUnhandledPattern(serveMux)
 
 	server := &Server{
 		httpserver: &http.Server{Addr: addr, Handler: serveMux},