diff --git a/app/Listeners/LinkCollector.php b/app/Listeners/LinkCollector.php
index 0484f95..0354f65 100644
--- a/app/Listeners/LinkCollector.php
+++ b/app/Listeners/LinkCollector.php
@@ -21,7 +21,8 @@ class LinkCollector
     /**
      * Create the event listener.
      *
-     * @return void
+     * @param Formatter $formatter
+     * @param MetadataResolver $metadataResolver
      */
     public function __construct(Formatter $formatter, MetadataResolver $metadataResolver)
     {
diff --git a/app/MetadataResolver/CienResolver.php b/app/MetadataResolver/CienResolver.php
index 73f8c0e..5af47c3 100644
--- a/app/MetadataResolver/CienResolver.php
+++ b/app/MetadataResolver/CienResolver.php
@@ -3,16 +3,30 @@
 namespace App\MetadataResolver;
 
 use Carbon\Carbon;
+use GuzzleHttp\Client;
 
 class CienResolver extends MetadataResolver
 {
+    /**
+     * @var Client
+     */
+    private $client;
+    /**
+     * @var OGPResolver
+     */
+    private $ogpResolver;
+
+    public function __construct(Client $client, OGPResolver $ogpResolver)
+    {
+        $this->client = $client;
+        $this->ogpResolver = $ogpResolver;
+    }
+
     public function resolve(string $url): Metadata
     {
-        $client = new \GuzzleHttp\Client();
-        $res = $client->get($url);
+        $res = $this->client->get($url);
         if ($res->getStatusCode() === 200) {
-            $ogpResolver = new OGPResolver();
-            $metadata = $ogpResolver->parse($res->getBody());
+            $metadata = $this->ogpResolver->parse($res->getBody());
 
             // 画像URLから有効期限の起点を拾う
             parse_str(parse_url($metadata->image, PHP_URL_QUERY), $params);
diff --git a/app/MetadataResolver/DLsiteResolver.php b/app/MetadataResolver/DLsiteResolver.php
index fc0d522..99aae49 100644
--- a/app/MetadataResolver/DLsiteResolver.php
+++ b/app/MetadataResolver/DLsiteResolver.php
@@ -2,16 +2,31 @@
 
 namespace App\MetadataResolver;
 
+use GuzzleHttp\Client;
+
 class DLsiteResolver implements Resolver
 {
+    /**
+     * @var Client
+     */
+    private $client;
+    /**
+     * @var OGPResolver
+     */
+    private $ogpResolver;
+
+    public function __construct(Client $client, OGPResolver $ogpResolver)
+    {
+        $this->client = $client;
+        $this->ogpResolver = $ogpResolver;
+    }
+
     public function resolve(string $url): Metadata
     {
-        $client = new \GuzzleHttp\Client();
-        $res = $client->get($url);
+        $res = $this->client->get($url);
         if ($res->getStatusCode() === 200) {
-            $ogpResolver = new OGPResolver();
-            $metadata = $ogpResolver->parse($res->getBody());
-            $metadata->image =  str_replace('img_sam.jpg', 'img_main.jpg', $metadata->image);
+            $metadata = $this->ogpResolver->parse($res->getBody());
+            $metadata->image = str_replace('img_sam.jpg', 'img_main.jpg', $metadata->image);
 
             return $metadata;
         } else {
diff --git a/app/MetadataResolver/DeviantArtResolver.php b/app/MetadataResolver/DeviantArtResolver.php
index fb939d5..2ef5898 100644
--- a/app/MetadataResolver/DeviantArtResolver.php
+++ b/app/MetadataResolver/DeviantArtResolver.php
@@ -2,15 +2,30 @@
 
 namespace App\MetadataResolver;
 
+use GuzzleHttp\Client;
+
 class DeviantArtResolver implements Resolver
 {
+    /**
+     * @var Client
+     */
+    private $client;
+    /**
+     * @var OGPResolver
+     */
+    private $ogpResolver;
+
+    public function __construct(Client $client, OGPResolver $ogpResolver)
+    {
+        $this->client = $client;
+        $this->ogpResolver = $ogpResolver;
+    }
+
     public function resolve(string $url): Metadata
     {
-        $client = new \GuzzleHttp\Client();
-        $res = $client->get($url);
+        $res = $this->client->get($url);
         if ($res->getStatusCode() === 200) {
-            $ogpResolver = new OGPResolver();
-            $metadata = $ogpResolver->parse($res->getBody());
+            $metadata = $this->ogpResolver->parse($res->getBody());
 
             $dom = new \DOMDocument();
             @$dom->loadHTML(mb_convert_encoding($res->getBody(), 'HTML-ENTITIES', 'UTF-8'));
diff --git a/app/MetadataResolver/FantiaResolver.php b/app/MetadataResolver/FantiaResolver.php
index 0a5e5b3..63af366 100644
--- a/app/MetadataResolver/FantiaResolver.php
+++ b/app/MetadataResolver/FantiaResolver.php
@@ -2,20 +2,33 @@
 
 namespace App\MetadataResolver;
 
+use GuzzleHttp\Client;
 use Illuminate\Support\Facades\Log;
 
 class FantiaResolver implements Resolver
 {
+    /**
+     * @var Client
+     */
+    private $client;
+    /**
+     * @var OGPResolver
+     */
+    private $ogpResolver;
+
+    public function __construct(Client $client, OGPResolver $ogpResolver)
+    {
+        $this->client = $client;
+        $this->ogpResolver = $ogpResolver;
+    }
     public function resolve(string $url): Metadata
     {
         preg_match("~\d+~", $url, $match);
         $postId = $match[0];
 
-        $client = new \GuzzleHttp\Client();
-        $res = $client->get($url);
+        $res = $this->client->get($url);
         if ($res->getStatusCode() === 200) {
-            $ogpResolver = new OGPResolver();
-            $metadata = $ogpResolver->parse($res->getBody());
+            $metadata = $this->ogpResolver->parse($res->getBody());
 
             $dom = new \DOMDocument();
             @$dom->loadHTML(mb_convert_encoding($res->getBody(), 'HTML-ENTITIES', 'UTF-8'));
diff --git a/app/MetadataResolver/FanzaResolver.php b/app/MetadataResolver/FanzaResolver.php
index de06b75..cfb73db 100644
--- a/app/MetadataResolver/FanzaResolver.php
+++ b/app/MetadataResolver/FanzaResolver.php
@@ -2,16 +2,31 @@
 
 namespace App\MetadataResolver;
 
+use GuzzleHttp\Client;
+
 class FanzaResolver implements Resolver
 {
+    /**
+     * @var Client
+     */
+    private $client;
+    /**
+     * @var OGPResolver
+     */
+    private $ogpResolver;
+
+    public function __construct(Client $client, OGPResolver $ogpResolver)
+    {
+        $this->client = $client;
+        $this->ogpResolver = $ogpResolver;
+    }
+
     public function resolve(string $url): Metadata
     {
-        $client = new \GuzzleHttp\Client();
-        $res = $client->get($url);
+        $res = $this->client->get($url);
         if ($res->getStatusCode() === 200) {
-            $ogpResolver = new OGPResolver();
-            $metadata = $ogpResolver->parse($res->getBody());
-            $metadata->image =  preg_replace("~(pr|ps)\.jpg$~", 'pl.jpg', $metadata->image);
+            $metadata = $this->ogpResolver->parse($res->getBody());
+            $metadata->image = preg_replace("~(pr|ps)\.jpg$~", 'pl.jpg', $metadata->image);
 
             return $metadata;
         } else {
diff --git a/app/MetadataResolver/IwaraResolver.php b/app/MetadataResolver/IwaraResolver.php
index 60aaf1b..361501d 100644
--- a/app/MetadataResolver/IwaraResolver.php
+++ b/app/MetadataResolver/IwaraResolver.php
@@ -2,12 +2,24 @@
 
 namespace App\MetadataResolver;
 
+use GuzzleHttp\Client;
+
 class IwaraResolver implements Resolver
 {
+    /**
+     * @var Client
+     */
+    private $client;
+
+    public function __construct(Client $client)
+    {
+        $this->client = $client;
+    }
+
     public function resolve(string $url): Metadata
     {
-        $client = new \GuzzleHttp\Client();
-        $res = $client->get($url);
+        $res = $this->client->get($url);
+
         if ($res->getStatusCode() === 200) {
             $dom = new \DOMDocument();
             @$dom->loadHTML(mb_convert_encoding($res->getBody(), 'HTML-ENTITIES', 'UTF-8'));
diff --git a/app/MetadataResolver/KomifloResolver.php b/app/MetadataResolver/KomifloResolver.php
index b09396a..f3007d3 100644
--- a/app/MetadataResolver/KomifloResolver.php
+++ b/app/MetadataResolver/KomifloResolver.php
@@ -2,8 +2,20 @@
 
 namespace App\MetadataResolver;
 
+use GuzzleHttp\Client;
+
 class KomifloResolver implements Resolver
 {
+    /**
+     * @var Client
+     */
+    private $client;
+
+    public function __construct(Client $client)
+    {
+        $this->client = $client;
+    }
+
     public function resolve(string $url): Metadata
     {
         if (preg_match('~komiflo\.com(?:/#!)?/comics/(\\d+)~', $url, $matches) !== 1) {
@@ -11,8 +23,7 @@ class KomifloResolver implements Resolver
         }
         $id = $matches[1];
 
-        $client = new \GuzzleHttp\Client();
-        $res = $client->get('https://api.komiflo.com/content/id/' . $id);
+        $res = $this->client->get('https://api.komiflo.com/content/id/' . $id);
         if ($res->getStatusCode() === 200) {
             $json = json_decode($res->getBody()->getContents(), true);
             $metadata = new Metadata();
diff --git a/app/MetadataResolver/MelonbooksResolver.php b/app/MetadataResolver/MelonbooksResolver.php
index 2e8b7fb..5cc3669 100644
--- a/app/MetadataResolver/MelonbooksResolver.php
+++ b/app/MetadataResolver/MelonbooksResolver.php
@@ -2,19 +2,33 @@
 
 namespace App\MetadataResolver;
 
+use GuzzleHttp\Client;
 use GuzzleHttp\Cookie\CookieJar;
 
 class MelonbooksResolver implements Resolver
 {
+    /**
+     * @var Client
+     */
+    private $client;
+    /**
+     * @var OGPResolver
+     */
+    private $ogpResolver;
+
+    public function __construct(Client $client, OGPResolver $ogpResolver)
+    {
+        $this->client = $client;
+        $this->ogpResolver = $ogpResolver;
+    }
+
     public function resolve(string $url): Metadata
     {
         $cookieJar = CookieJar::fromArray(['AUTH_ADULT' => '1'], 'www.melonbooks.co.jp');
 
-        $client = new \GuzzleHttp\Client();
-        $res = $client->get($url, ['cookies' => $cookieJar]);
+        $res = $this->client->get($url, ['cookies' => $cookieJar]);
         if ($res->getStatusCode() === 200) {
-            $ogpResolver = new OGPResolver();
-            $metadata = $ogpResolver->parse($res->getBody());
+            $metadata = $this->ogpResolver->parse($res->getBody());
 
             // censoredフラグの除去
             if (mb_strpos($metadata->image, '&c=1') !== false) {
diff --git a/app/MetadataResolver/MetadataResolver.php b/app/MetadataResolver/MetadataResolver.php
index b55da22..5759bf3 100644
--- a/app/MetadataResolver/MetadataResolver.php
+++ b/app/MetadataResolver/MetadataResolver.php
@@ -37,7 +37,8 @@ class MetadataResolver implements Resolver
     {
         foreach ($this->rules as $pattern => $class) {
             if (preg_match($pattern, $url) === 1) {
-                $resolver = new $class();
+                /** @var Resolver $resolver */
+                $resolver = app($class);
 
                 return $resolver->resolve($url);
             }
@@ -49,13 +50,14 @@ class MetadataResolver implements Resolver
         }
 
         if (isset($this->defaultResolver)) {
-            $resolver = new $this->defaultResolver();
+            /** @var Resolver $resolver */
+            $resolver = app($this->defaultResolver);
             return $resolver->resolve($url);
         }
 
         throw new \UnexpectedValueException('URL not matched.');
     }
-    
+
     public function resolveWithAcceptHeader(string $url): ?Metadata
     {
         try {
diff --git a/app/MetadataResolver/NarouResolver.php b/app/MetadataResolver/NarouResolver.php
index 5f14d0a..6600b23 100644
--- a/app/MetadataResolver/NarouResolver.php
+++ b/app/MetadataResolver/NarouResolver.php
@@ -2,19 +2,33 @@
 
 namespace App\MetadataResolver;
 
+use GuzzleHttp\Client;
 use GuzzleHttp\Cookie\CookieJar;
 
 class NarouResolver implements Resolver
 {
+    /**
+     * @var Client
+     */
+    private $client;
+    /**
+     * @var OGPResolver
+     */
+    private $ogpResolver;
+
+    public function __construct(Client $client, OGPResolver $ogpResolver)
+    {
+        $this->client = $client;
+        $this->ogpResolver = $ogpResolver;
+    }
+
     public function resolve(string $url): Metadata
     {
         $cookieJar = CookieJar::fromArray(['over18' => 'yes'], '.syosetu.com');
 
-        $client = new \GuzzleHttp\Client();
-        $res = $client->get($url, ['cookies' => $cookieJar]);
+        $res = $this->client->get($url, ['cookies' => $cookieJar]);
         if ($res->getStatusCode() === 200) {
-            $ogpResolver = new OGPResolver();
-            $metadata = $ogpResolver->parse($res->getBody());
+            $metadata = $this->ogpResolver->parse($res->getBody());
             $metadata->description = '';
 
             $dom = new \DOMDocument();
diff --git a/app/MetadataResolver/NicoSeigaResolver.php b/app/MetadataResolver/NicoSeigaResolver.php
index 3e6d5c0..3f2e000 100644
--- a/app/MetadataResolver/NicoSeigaResolver.php
+++ b/app/MetadataResolver/NicoSeigaResolver.php
@@ -2,15 +2,30 @@
 
 namespace App\MetadataResolver;
 
+use GuzzleHttp\Client;
+
 class NicoSeigaResolver implements Resolver
 {
+    /**
+     * @var Client
+     */
+    private $client;
+    /**
+     * @var OGPResolver
+     */
+    private $ogpResolver;
+
+    public function __construct(Client $client, OGPResolver $ogpResolver)
+    {
+        $this->client = $client;
+        $this->ogpResolver = $ogpResolver;
+    }
+
     public function resolve(string $url): Metadata
     {
-        $client = new \GuzzleHttp\Client();
-        $res = $client->get($url);
+        $res = $this->client->get($url);
         if ($res->getStatusCode() === 200) {
-            $ogpResolver = new OGPResolver();
-            $metadata = $ogpResolver->parse($res->getBody());
+            $metadata = $this->ogpResolver->parse($res->getBody());
 
             // ページURLからサムネイルURLに変換
             preg_match('~http://(?:(?:sp\\.)?seiga\\.nicovideo\\.jp/seiga(?:/#!)?|nico\\.ms)/im(\\d+)~', $url, $matches);
diff --git a/app/MetadataResolver/NijieResolver.php b/app/MetadataResolver/NijieResolver.php
index 45b73de..c39f096 100644
--- a/app/MetadataResolver/NijieResolver.php
+++ b/app/MetadataResolver/NijieResolver.php
@@ -2,8 +2,18 @@
 
 namespace App\MetadataResolver;
 
+use GuzzleHttp\Client;
+
 class NijieResolver implements Resolver
 {
+    /** @var Client */
+    protected $client;
+
+    public function __construct(Client $client)
+    {
+        $this->client = $client;
+    }
+
     public function resolve(string $url): Metadata
     {
         if (mb_strpos($url, '//sp.nijie.info') !== false) {
@@ -13,7 +23,7 @@ class NijieResolver implements Resolver
             $url = preg_replace('~view_popup\.php~', 'view.php', $url);
         }
 
-        $client = new \GuzzleHttp\Client();
+        $client = $this->client;
         $res = $client->get($url);
         if ($res->getStatusCode() === 200) {
             $ogpResolver = new OGPResolver();
diff --git a/app/MetadataResolver/OGPResolver.php b/app/MetadataResolver/OGPResolver.php
index 1cf4c1e..f8e185e 100644
--- a/app/MetadataResolver/OGPResolver.php
+++ b/app/MetadataResolver/OGPResolver.php
@@ -2,12 +2,23 @@
 
 namespace App\MetadataResolver;
 
+use GuzzleHttp\Client;
+
 class OGPResolver implements Resolver, Parser
 {
+    /**
+     * @var Client
+     */
+    private $client;
+
+    public function __construct(Client $client)
+    {
+        $this->client = $client;
+    }
+
     public function resolve(string $url): Metadata
     {
-        $client = new \GuzzleHttp\Client();
-        $res = $client->get($url);
+        $res = $this->client->get($url);
         if ($res->getStatusCode() === 200) {
             return $this->parse($res->getBody());
         } else {
diff --git a/app/MetadataResolver/PatreonResolver.php b/app/MetadataResolver/PatreonResolver.php
index 78f461a..5ce28e7 100644
--- a/app/MetadataResolver/PatreonResolver.php
+++ b/app/MetadataResolver/PatreonResolver.php
@@ -3,19 +3,33 @@
 namespace App\MetadataResolver;
 
 use Carbon\Carbon;
+use GuzzleHttp\Client;
 
 class PatreonResolver implements Resolver
 {
+    /**
+     * @var Client
+     */
+    private $client;
+    /**
+     * @var OGPResolver
+     */
+    private $ogpResolver;
+
+    public function __construct(Client $client, OGPResolver $ogpResolver)
+    {
+        $this->client = $client;
+        $this->ogpResolver = $ogpResolver;
+    }
+
     public function resolve(string $url): Metadata
     {
-        $client = new \GuzzleHttp\Client();
-        $res = $client->get($url);
+        $res = $this->client->get($url);
         if ($res->getStatusCode() === 200) {
-            $ogpResolver = new OGPResolver();
-            $metadata = $ogpResolver->parse($res->getBody());
+            $metadata = $this->ogpResolver->parse($res->getBody());
 
             parse_str(parse_url($metadata->image, PHP_URL_QUERY), $temp);
-            $expires_at_unixtime = $temp["token-time"];
+            $expires_at_unixtime = $temp['token-time'];
             $expires_at = Carbon::createFromTimestamp($expires_at_unixtime);
 
             $metadata->expires_at = $expires_at;
diff --git a/app/MetadataResolver/PixivResolver.php b/app/MetadataResolver/PixivResolver.php
index 16c89d9..094fcd2 100644
--- a/app/MetadataResolver/PixivResolver.php
+++ b/app/MetadataResolver/PixivResolver.php
@@ -2,8 +2,25 @@
 
 namespace App\MetadataResolver;
 
+use GuzzleHttp\Client;
+
 class PixivResolver implements Resolver
 {
+    /**
+     * @var Client
+     */
+    private $client;
+    /**
+     * @var OGPResolver
+     */
+    private $ogpResolver;
+
+    public function __construct(Client $client, OGPResolver $ogpResolver)
+    {
+        $this->client = $client;
+        $this->ogpResolver = $ogpResolver;
+    }
+
     /**
      * サムネイル画像 URL から最大長辺 1200px の画像 URL に変換する
      *
@@ -45,11 +62,9 @@ class PixivResolver implements Resolver
             $url = preg_replace('~mode=manga(_big)?~', 'mode=medium', $url);
         }
 
-        $client = new \GuzzleHttp\Client();
-        $res = $client->get($url);
+        $res = $this->client->get($url);
         if ($res->getStatusCode() === 200) {
-            $ogpResolver = new OGPResolver();
-            $metadata = $ogpResolver->parse($res->getBody());
+            $metadata = $this->ogpResolver->parse($res->getBody());
 
             preg_match("~https://i\.pximg\.net/c/128x128/img-master/img/\d{4}/\d{2}/\d{2}/\d{2}/\d{2}/\d{2}/{$illustId}(_p0)?_square1200\.jpg~", $res->getBody(), $match);
             $illustThumbnailUrl = $match[0];
diff --git a/app/MetadataResolver/ToranoanaResolver.php b/app/MetadataResolver/ToranoanaResolver.php
index 968fff6..27b900e 100644
--- a/app/MetadataResolver/ToranoanaResolver.php
+++ b/app/MetadataResolver/ToranoanaResolver.php
@@ -2,20 +2,34 @@
 
 namespace App\MetadataResolver;
 
+use GuzzleHttp\Client;
 use GuzzleHttp\Cookie\CookieJar;
 
 class ToranoanaResolver implements Resolver
 {
+    /**
+     * @var Client
+     */
+    private $client;
+    /**
+     * @var OGPResolver
+     */
+    private $ogpResolver;
+
+    public function __construct(Client $client, OGPResolver $ogpResolver)
+    {
+        $this->client = $client;
+        $this->ogpResolver = $ogpResolver;
+    }
+
     public function resolve(string $url): Metadata
     {
         $cookieJar = CookieJar::fromArray(['adflg' => '0'], 'ec.toranoana.jp');
 
-        $client = new \GuzzleHttp\Client();
-        $res = $client->get($url, ['cookies' => $cookieJar]);
+        $res = $this->client->get($url, ['cookies' => $cookieJar]);
         if ($res->getStatusCode() === 200) {
-            $ogpResolver = new OGPResolver();
 
-            return $ogpResolver->parse($res->getBody());
+            return $this->ogpResolver->parse($res->getBody());
         } else {
             throw new \RuntimeException("{$res->getStatusCode()}: $url");
         }