diff --git a/app/Utilities/Formatter.php b/app/Utilities/Formatter.php
index bb87a61..fd7da98 100644
--- a/app/Utilities/Formatter.php
+++ b/app/Utilities/Formatter.php
@@ -2,8 +2,18 @@
 
 namespace App\Utilities;
 
+use Misd\Linkify\Linkify;
+
 class Formatter
 {
+    /** @var Linkify */
+    private $linkify;
+
+    public function __construct()
+    {
+        $this->linkify = new Linkify();
+    }
+
     /**
      * 通算秒数を日数と時分にフォーマットします。
      * @param int|float $value 通算秒数
@@ -16,4 +26,14 @@ class Formatter
         $minutes = floor($value % 3600 / 60);
         return "{$days}日 {$hours}時間 {$minutes}分";
     }
+
+    /**
+     * テキスト内のURLをHTMLのリンクに置き換えます。
+     * @param string $text テキスト
+     * @return string URLをリンクに置き換えた文字列
+     */
+    public function linkify($text)
+    {
+        return $this->linkify->processUrls($text);
+    }
 }
\ No newline at end of file
diff --git a/composer.json b/composer.json
index 21bfed3..6a8cc49 100644
--- a/composer.json
+++ b/composer.json
@@ -8,6 +8,7 @@
         "php": ">=7.0.0",
         "laravel/framework": "5.5.*",
         "laravel/tinker": "~1.0",
+        "misd/linkify": "^1.1",
         "parsedown/laravel": "~1.0"
     },
     "require-dev": {
diff --git a/composer.lock b/composer.lock
index 231987b..c766e56 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "content-hash": "8fd656953b9909fbcbecf476db92f15c",
+    "content-hash": "49697b9f7b0f02fe37b2bff14bddf200",
     "packages": [
         {
             "name": "dnoegel/php-xdg-base-dir",
@@ -623,6 +623,51 @@
             ],
             "time": "2017-08-06T17:41:04+00:00"
         },
+        {
+            "name": "misd/linkify",
+            "version": "v1.1.4",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/misd-service-development/php-linkify.git",
+                "reference": "3481b148806a23b4001712de645247a1a4dcc10a"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/misd-service-development/php-linkify/zipball/3481b148806a23b4001712de645247a1a4dcc10a",
+                "reference": "3481b148806a23b4001712de645247a1a4dcc10a",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.0 || ^5.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.1.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Misd\\Linkify\\": "src/Misd/Linkify"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "description": "Converts URLs and email addresses in text into HTML links",
+            "homepage": "https://github.com/misd-service-development/php-linkify",
+            "keywords": [
+                "convert",
+                "email address",
+                "link",
+                "url"
+            ],
+            "time": "2017-08-17T08:33:35+00:00"
+        },
         {
             "name": "monolog/monolog",
             "version": "1.23.0",
diff --git a/resources/views/layouts/base-old.blade.php b/resources/views/layouts/base-old.blade.php
index 2865eae..6534525 100644
--- a/resources/views/layouts/base-old.blade.php
+++ b/resources/views/layouts/base-old.blade.php
@@ -20,7 +20,7 @@
     </form>
     @if (Auth::check())
         <ul id="accountMenu" class="dropdown-content">
-            <li><a href="{{ route('profile') }}">プロフィール</a></li>
+            <li><a href="{{ route('user.profile') }}">プロフィール</a></li>
             <li class="divider"></li>
             <li><a href="{{ route('logout') }}" onclick="event.preventDefault(); document.getElementById('logout-form').submit();">ログアウト</a></li>
         </ul>
@@ -45,7 +45,7 @@
 
             <ul id="nav-mobile" class="side-nav">
                 <li><a href="#">{{ Auth::user()->display_name }} さん</a></li>
-                <li><a href="{{ route('profile') }}">プロフィール</a></li>
+                <li><a href="{{ route('user.profile') }}">プロフィール</a></li>
                 <li class="divider"></li>
                 <li><a href="{{ route('logout') }}" onclick="event.preventDefault(); document.getElementById('logout-form').submit();">ログアウト</a></li>
             </ul>
diff --git a/resources/views/user/profile.blade.php b/resources/views/user/profile.blade.php
index 121edef..51cbdd1 100644
--- a/resources/views/user/profile.blade.php
+++ b/resources/views/user/profile.blade.php
@@ -41,7 +41,7 @@
             <!-- note -->
             @if (!empty($ejaculation['note']))
                 <p class="mb-0">
-                    {{ $ejaculation['note'] }}
+                    {!! Formatter::linkify(nl2br(e($ejaculation['note']))) !!}
                 </p>
             @endif
         </li>