diff --git a/w_okada's_Voice_Changer_version_2_x.ipynb b/w_okada's_Voice_Changer_version_2_x.ipynb
index e6bfe8d3..e3cd806e 100644
--- a/w_okada's_Voice_Changer_version_2_x.ipynb
+++ b/w_okada's_Voice_Changer_version_2_x.ipynb
@@ -196,14 +196,19 @@
         "# @title **[2]** Start server\n",
         "# @markdown This cell will start the server, the first time that you run it will download the models, so it can take a while (2~4 minutes)\n",
         "\n",
+        "# @markdown If you want to use ngrok, please input your token in the option section below. If you encounter a 403 error with the colab proxy, using ngrok can sometimes help to work around it.\n",
+        "# @markdown https://dashboard.ngrok.com/\n",
+        "\n",
         "\n",
         "# @markdown ### Options:\n",
         "ClearConsole = True  # @param {type:\"boolean\"}\n",
         "Play_Notification = True  # @param {type:\"boolean\"}\n",
+        "NgrokToken = \"\"  # @param {type:\"string\"}\n",
         "\n",
         "PORT=8003\n",
+        "NGROK_URL_FILE = \"ngrok_url.txt\"\n",
         "\n",
-        "LOG_FILE = f\"/content/LOG_FILE_{PORT}\"\n",
+        "LOG_FILE = f\"/content/LOG_FILE_{PORT}.log\"\n",
         "\n",
         "from IPython.display import Audio, display\n",
         "def play_notification_sound(url):\n",
@@ -214,8 +219,7 @@
         "\n",
         "if mode == \"elf\":\n",
         "  # !LD_LIBRARY_PATH=/usr/lib64-nvidia:/usr/lib/x86_64-linux-gnu ./vcclient_latest_for_colab cui --port {PORT} --no_cui true &\n",
-        "\n",
-        "  get_ipython().system_raw(f'LD_LIBRARY_PATH=/usr/lib64-nvidia:/usr/lib/x86_64-linux-gnu ./vcclient_latest_for_colab cui --port {PORT} --no_cui true >{LOG_FILE} 2>&1 &')\n",
+        "  get_ipython().system_raw(f'LD_LIBRARY_PATH=/usr/lib64-nvidia:/usr/lib/x86_64-linux-gnu ./vcclient_latest_for_colab cui --port {PORT} --no_cui true --https False --ngrok_token {NgrokToken} --ngrok_proxy_url_file {NGROK_URL_FILE} >{LOG_FILE} 2>&1 &')\n",
         "elif mode == \"zip\":\n",
         "  !LD_LIBRARY_PATH=/usr/lib64-nvidia:/usr/lib/x86_64-linux-gnu ./main cui --port {PORT} --no_cui true &\n",
         "\n",
@@ -251,7 +255,11 @@
         "  print(\"--------- SERVER READY! ---------\")\n",
         "  print(f\"Your server is available. elapsed: {elapsed_time}sec\")\n",
         "  proxy = eval_js( \"google.colab.kernel.proxyPort(\" + str(PORT) + \")\" )\n",
-        "  print(f\"{proxy}\")\n",
+        "  print(f\"colab proxy: {proxy}\")\n",
+        "  if NgrokToken != \"\":\n",
+        "    with open(NGROK_URL_FILE, \"r\") as f:\n",
+        "      ngrok_url = f.read().strip()\n",
+        "    print(f\"Ngrok URL: {ngrok_url}\")\n",
         "  print(\"---------------------------------\")\n",
         "  if Play_Notification==True:\n",
         "    play_notification_sound('https://huggingface.co/wok000/voices/resolve/main/vcclient001_vctk229_gpt-sovits_vcclient-ready.wav')\n",
@@ -279,7 +287,7 @@
     "colab": {
       "provenance": [],
       "gpuType": "T4",
-      "authorship_tag": "ABX9TyPpbFBssircyl/qT8uDX2zy",
+      "authorship_tag": "ABX9TyOQ2VZFXCzGQTAvv2SwjJz1",
       "include_colab_link": true
     },
     "kernelspec": {