diff --git a/VoiceChangerDemo.ipynb b/VoiceChangerDemo.ipynb
index 5a4d002b8..d6323835b 100644
--- a/VoiceChangerDemo.ipynb
+++ b/VoiceChangerDemo.ipynb
@@ -6,7 +6,7 @@
       "name": "VoiceChangerDemo",
       "provenance": [],
       "collapsed_sections": [],
-      "authorship_tag": "ABX9TyPUNk3o1zBcw8KyZOFlhFH1",
+      "authorship_tag": "ABX9TyNsebbGTAbXg9EaDMhWvvBh",
       "include_colab_link": true
     },
     "kernelspec": {
@@ -42,7 +42,7 @@
         "\n",
         "正式版は、多くの場合より少ないタイムラグで滑らかに音声を変換できます。\n",
         "\n",
-        "詳細な使用方法はこちらの[リポジトリ](https://https://github.com/w-okada/voice-changer)からご確認ください。\n"
+        "詳細な使用方法はこちらの[リポジトリ](https://github.com/w-okada/voice-changer)からご確認ください。\n"
       ],
       "metadata": {
         "id": "Lbbmx_Vjl0zo"
@@ -77,7 +77,7 @@
         "id": "vV1t7PBRm-o6",
         "outputId": "5f5c582b-08f3-4575-db1e-6524a16fbc30"
       },
-      "execution_count": 1,
+      "execution_count": null,
       "outputs": [
         {
           "output_type": "stream",
@@ -130,12 +130,12 @@
       "metadata": {
         "id": "nSXATMWYb4Ik"
       },
-      "execution_count": 2,
+      "execution_count": null,
       "outputs": []
     },
     {
       "cell_type": "code",
-      "execution_count": 3,
+      "execution_count": null,
       "metadata": {
         "colab": {
           "base_uri": "https://localhost:8080/"
@@ -182,7 +182,7 @@
         "id": "86wTFmqsNMnD",
         "outputId": "078feaed-9b1a-4946-f1e8-0a87d447e392"
       },
-      "execution_count": 4,
+      "execution_count": null,
       "outputs": [
         {
           "output_type": "stream",
@@ -227,7 +227,7 @@
         "id": "uCEKf3_JNoyq",
         "outputId": "fd4efece-deaa-4766-a5c1-c6866eb5ffe1"
       },
-      "execution_count": 5,
+      "execution_count": null,
       "outputs": [
         {
           "output_type": "stream",
@@ -248,7 +248,7 @@
       "metadata": {
         "id": "Bn4kV8TgXp8i"
       },
-      "execution_count": 6,
+      "execution_count": null,
       "outputs": []
     },
     {
@@ -264,7 +264,7 @@
         "id": "pjxPsOOaXXTj",
         "outputId": "99ad8af6-d4d0-4ba1-c5fe-a5c701b38a0a"
       },
-      "execution_count": 7,
+      "execution_count": null,
       "outputs": [
         {
           "output_type": "stream",
@@ -341,7 +341,7 @@
         "id": "LwZAAuqxX7yY",
         "outputId": "d45cbfdf-27aa-4a00-baee-a6e6e5646a01"
       },
-      "execution_count": 8,
+      "execution_count": null,
       "outputs": [
         {
           "output_type": "stream",
@@ -556,7 +556,7 @@
       "metadata": {
         "id": "iNOAB7zISI6J"
       },
-      "execution_count": 9,
+      "execution_count": null,
       "outputs": []
     },
     {
@@ -572,7 +572,7 @@
         "id": "chu06KpAjEK6",
         "outputId": "2f203b23-54a3-4d0b-e173-c8f2628c0dd0"
       },
-      "execution_count": 14,
+      "execution_count": null,
       "outputs": [
         {
           "output_type": "stream",
@@ -636,7 +636,7 @@
         },
         "outputId": "84879cea-2a09-428a-d707-857bc43d5cb1"
       },
-      "execution_count": 15,
+      "execution_count": null,
       "outputs": [
         {
           "output_type": "display_data",