diff --git a/app/Http/Controllers/UserController.php b/app/Http/Controllers/UserController.php
index b6cf901..beb463c 100644
--- a/app/Http/Controllers/UserController.php
+++ b/app/Http/Controllers/UserController.php
@@ -83,7 +83,7 @@ SQL
         ))
             ->where('user_id', $user->id)
             ->groupBy(DB::raw("to_char(ejaculated_date, 'HH24')"))
-            ->orderBy(DB::raw("1"))
+            ->orderBy(DB::raw('1'))
             ->get();
 
         $dailySum = [];
diff --git a/app/MetadataResolver/DLsiteResolver.php b/app/MetadataResolver/DLsiteResolver.php
index ac1a717..fc0d522 100644
--- a/app/MetadataResolver/DLsiteResolver.php
+++ b/app/MetadataResolver/DLsiteResolver.php
@@ -11,7 +11,7 @@ class DLsiteResolver implements Resolver
         if ($res->getStatusCode() === 200) {
             $ogpResolver = new OGPResolver();
             $metadata = $ogpResolver->parse($res->getBody());
-            $metadata->image =  str_replace("img_sam.jpg", "img_main.jpg", $metadata->image);
+            $metadata->image =  str_replace('img_sam.jpg', 'img_main.jpg', $metadata->image);
 
             return $metadata;
         } else {
diff --git a/app/MetadataResolver/FantiaResolver.php b/app/MetadataResolver/FantiaResolver.php
index 8a998c4..0a5e5b3 100644
--- a/app/MetadataResolver/FantiaResolver.php
+++ b/app/MetadataResolver/FantiaResolver.php
@@ -25,7 +25,7 @@ class FantiaResolver implements Resolver
             $ogpUrl = $node->getAttribute('content');
 
             // 投稿に画像がない場合（ogp.jpgでない場合）のみ大きい画像に変換する
-            if ($ogpUrl != "http://fantia.jp/images/ogp.jpg") {
+            if ($ogpUrl != 'http://fantia.jp/images/ogp.jpg') {
                 preg_match("~https://fantia\.s3\.amazonaws\.com/uploads/post/file/{$postId}/ogp_(.*?)\.(jpg|png)~", $ogpUrl, $match);
                 $uuid = $match[1];
                 $extension = $match[2];
diff --git a/app/MetadataResolver/FanzaResolver.php b/app/MetadataResolver/FanzaResolver.php
index 4f4941d..de06b75 100644
--- a/app/MetadataResolver/FanzaResolver.php
+++ b/app/MetadataResolver/FanzaResolver.php
@@ -11,7 +11,7 @@ class FanzaResolver implements Resolver
         if ($res->getStatusCode() === 200) {
             $ogpResolver = new OGPResolver();
             $metadata = $ogpResolver->parse($res->getBody());
-            $metadata->image =  preg_replace("~(pr|ps)\.jpg$~", "pl.jpg", $metadata->image);
+            $metadata->image =  preg_replace("~(pr|ps)\.jpg$~", 'pl.jpg', $metadata->image);
 
             return $metadata;
         } else {
diff --git a/app/MetadataResolver/KomifloResolver.php b/app/MetadataResolver/KomifloResolver.php
index 04b6248..8fb569c 100644
--- a/app/MetadataResolver/KomifloResolver.php
+++ b/app/MetadataResolver/KomifloResolver.php
@@ -23,7 +23,7 @@ class KomifloResolver implements Resolver
             $metadata->description = ($json['content']['attributes']['artists']['children'][0]['data']['name'] ?? '?') .
                 ' - ' .
                 ($json['content']['parents'][0]['data']['title'] ?? '?');
-            $metadata->image = $json['content']['cdn_public'] . "/564_mobile_large_3x/" . $json['content']['named_imgs']['cover']['filename'] . $json['content']['signature'];
+            $metadata->image = $json['content']['cdn_public'] . '/564_mobile_large_3x/' . $json['content']['named_imgs']['cover']['filename'] . $json['content']['signature'];
             $metadata->expires_at = Carbon::parse($json['content']['signature_expires'])->setTimezone(config('app.timezone'));
 
             return $metadata;
diff --git a/app/MetadataResolver/PixivResolver.php b/app/MetadataResolver/PixivResolver.php
index b859675..ca5463c 100644
--- a/app/MetadataResolver/PixivResolver.php
+++ b/app/MetadataResolver/PixivResolver.php
@@ -12,8 +12,8 @@ class PixivResolver implements Resolver
      */
     public function thumbnailToMasterUrl(string $thumbnailUrl): string
     {
-        $temp = str_replace("/c/128x128", "", $thumbnailUrl);
-        $largeUrl = str_replace("square1200.jpg", "master1200.jpg", $temp);
+        $temp = str_replace('/c/128x128', '', $thumbnailUrl);
+        $largeUrl = str_replace('square1200.jpg', 'master1200.jpg', $temp);
 
         return $largeUrl;
     }
@@ -27,21 +27,21 @@ class PixivResolver implements Resolver
      */
     public function proxize(string $pixivUrl): string
     {
-        return str_replace("i.pximg.net", "i.pixiv.cat", $pixivUrl);
+        return str_replace('i.pximg.net', 'i.pixiv.cat', $pixivUrl);
     }
 
     public function resolve(string $url): Metadata
     {
-        preg_match("~illust_id=(\d+)~", parse_url($url)["query"], $match);
+        preg_match("~illust_id=(\d+)~", parse_url($url)['query'], $match);
         $illustId = $match[1];
 
         // 漫画ページかつページ数あり
-        if (strpos(parse_url($url)["query"], "mode=manga_big") && strpos(parse_url($url)["query"], "page=")) {
-            preg_match("~page=(\d+)~", parse_url($url)["query"], $match);
+        if (strpos(parse_url($url)['query'], 'mode=manga_big') && strpos(parse_url($url)['query'], 'page=')) {
+            preg_match("~page=(\d+)~", parse_url($url)['query'], $match);
             $page = $match[1];
 
             // 未ログインでは漫画ページを開けないため、URL を作品ページに変換する
-            $url = str_replace("mode=manga_big", "mode=medium", $url);
+            $url = str_replace('mode=manga_big', 'mode=medium', $url);
 
             $client = new \GuzzleHttp\Client();
             $res = $client->get($url);
@@ -55,7 +55,7 @@ class PixivResolver implements Resolver
                 $illustUrl = $this->thumbnailToMasterUrl($illustThumbnailUrl);
 
                 // 指定ページに変換
-                $illustUrl = str_replace("p0_master", "p{$page}_master", $illustUrl);
+                $illustUrl = str_replace('p0_master', "p{$page}_master", $illustUrl);
 
                 $metadata->image =  $this->proxize($illustUrl);
 
@@ -71,10 +71,10 @@ class PixivResolver implements Resolver
                 $metadata = $ogpResolver->parse($res->getBody());
 
                 // OGP がデフォルト画像であるようならなんとかして画像を取得する
-                if (strpos($metadata->image, "pixiv_logo.gif") || strpos($metadata->image, "pictures.jpg")) {
+                if (strpos($metadata->image, 'pixiv_logo.gif') || strpos($metadata->image, 'pictures.jpg')) {
 
                     // 作品ページの場合のみ対応
-                    if (strpos(parse_url($url)["query"], "mode=medium")) {
+                    if (strpos(parse_url($url)['query'], 'mode=medium')) {
                         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/database/migrations/2019_01_15_143800_add_expires_on_metadata.php b/database/migrations/2019_01_15_143800_add_expires_on_metadata.php
index 46891e1..673588e 100644
--- a/database/migrations/2019_01_15_143800_add_expires_on_metadata.php
+++ b/database/migrations/2019_01_15_143800_add_expires_on_metadata.php
@@ -1,8 +1,8 @@
 <?php
 
-use Illuminate\Support\Facades\Schema;
-use Illuminate\Database\Schema\Blueprint;
 use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
 
 class AddExpiresOnMetadata extends Migration
 {
diff --git a/tests/Unit/MetadataResolver/NijieResolverTest.php b/tests/Unit/MetadataResolver/NijieResolverTest.php
index a1429fa..25f361f 100644
--- a/tests/Unit/MetadataResolver/NijieResolverTest.php
+++ b/tests/Unit/MetadataResolver/NijieResolverTest.php
@@ -38,7 +38,7 @@ class NijieResolverTest extends TestCase
 
         $metadata = $resolver->resolve('https://nijie.info/view.php?id=9537');
         $this->assertEquals('ニジエがgifに対応したんだってね　奥さん | 黒末アプコ', $metadata->title);
-        $this->assertEquals("アニメgifとか専門外なのでよくわかりませんでした", $metadata->description);
+        $this->assertEquals('アニメgifとか専門外なのでよくわかりませんでした', $metadata->description);
         $this->assertRegExp('~/nijie\.info/pic/logo~', $metadata->image);
     }
 
@@ -84,7 +84,7 @@ class NijieResolverTest extends TestCase
 
         $metadata = $resolver->resolve('https://nijie.info/view.php?id=9537');
         $this->assertEquals('ニジエがgifに対応したんだってね　奥さん | 黒末アプコ', $metadata->title);
-        $this->assertEquals("アニメgifとか専門外なのでよくわかりませんでした", $metadata->description);
+        $this->assertEquals('アニメgifとか専門外なのでよくわかりませんでした', $metadata->description);
         $this->assertRegExp('~/nijie\.info/pic/logo~', $metadata->image);
     }
 
diff --git a/tests/Unit/Utilities/FormatterTest.php b/tests/Unit/Utilities/FormatterTest.php
index dd9f0a2..fca2fba 100644
--- a/tests/Unit/Utilities/FormatterTest.php
+++ b/tests/Unit/Utilities/FormatterTest.php
@@ -54,4 +54,4 @@ class FormatterTest extends TestCase
         $url = 'http://example.com/path/to?foo=bar&hoge=fuga#';
         $this->assertEquals('http://example.com/path/to?foo=bar&hoge=fuga', $formatter->normalizeUrl($url));
     }
-}
\ No newline at end of file
+}