diff --git a/main/config.h b/main/config.h
index 121f5b0..7304cc4 100644
--- a/main/config.h
+++ b/main/config.h
@@ -269,3 +269,5 @@ const char *const language_names[] = {
 #endif
 
 static constexpr uint8_t NUM_LANGUAGES = sizeof(languages) / sizeof(const char *);
+
+// #define METRICS 1   // un comment to enable Prometheus exporter
diff --git a/main/languages/vi-VN.h b/main/languages/vi-VN.h
index a2400b8..ef83d38 100644
--- a/main/languages/vi-VN.h
+++ b/main/languages/vi-VN.h
@@ -92,7 +92,7 @@ namespace vi
   // Page Status
   const char txt_status_title[] PROGMEM = "Trạng thái";
   const char txt_status_hvac[] PROGMEM = "Trạng thái ĐH";
-  const char txt_retries_hvac[] PROGMEM = "HVAC Connection Retries";
+  const char txt_retries_hvac[] PROGMEM = "ĐH thử lại kết nối";
   const char txt_status_mqtt[] PROGMEM = "Trạng thái MQTT";
   const char txt_status_wifi_ip[] PROGMEM = "WIFI IP";
   const char txt_failed_get_wifi_ip[] PROGMEM = "Lỗi khi lấy địa chỉ IP";
diff --git a/main/main.cpp b/main/main.cpp
index ec386f6..4247121 100644
--- a/main/main.cpp
+++ b/main/main.cpp
@@ -20,7 +20,9 @@
 #include "html_init.h"    // code html for initial config
 #include "html_menu.h"    // code html for menu
 #include "html_pages.h"   // code html for pages
+#ifdef METRICS
 #include "html_metrics.h" // prometheus metrics
+#endif
 
 // Start header for build with IDF and Platformio
 bool loadWifi();
@@ -213,7 +215,9 @@ void setup()
     server.on("/unit", handleUnit);
     server.on("/status", handleStatus);
     server.on("/others", handleOthers);
+#ifdef METRICS
     server.on("/metrics", handleMetrics);
+#endif
     server.onNotFound(handleNotFound);
     if (login_password.length() > 0)
     {