diff --git a/app/Listeners/LinkCollector.php b/app/Listeners/LinkCollector.php
index 81e97f1..0484f95 100644
--- a/app/Listeners/LinkCollector.php
+++ b/app/Listeners/LinkCollector.php
@@ -43,14 +43,14 @@ class LinkCollector
         // 無かったら取得
         // TODO: ある程度古かったら再取得とかありだと思う
         $metadata = Metadata::find($url);
-        if ($metadata == null) {
+        if ($metadata == null || ($metadata->expires_at !== null && $metadata->expires_at < now())) {
             try {
                 $resolved = $this->metadataResolver->resolve($url);
-                Metadata::create([
-                    'url' => $url,
+                Metadata::updateOrCreate(['url' => $url], [
                     'title' => $resolved->title,
                     'description' => $resolved->description,
-                    'image' => $resolved->image
+                    'image' => $resolved->image,
+                    'expires_at' => $resolved->expires_at
                 ]);
             } catch (TransferException $e) {
                 // 何らかの通信エラーによってメタデータの取得に失敗した時、とりあえずエラーログにURLを残す
diff --git a/app/Metadata.php b/app/Metadata.php
index 98badb6..dc44009 100644
--- a/app/Metadata.php
+++ b/app/Metadata.php
@@ -10,6 +10,8 @@ class Metadata extends Model
     protected $primaryKey = 'url';
     protected $keyType = 'string';
 
-    protected $fillable = ['url', 'title', 'description', 'image'];
-    protected $visible = ['url', 'title', 'description', 'image'];
+    protected $fillable = ['url', 'title', 'description', 'image', 'expires_at'];
+    protected $visible = ['url', 'title', 'description', 'image', 'expires_at'];
+
+    protected $dates = ['created_at', 'updated_at', 'expires_at'];
 }
diff --git a/app/MetadataResolver/Metadata.php b/app/MetadataResolver/Metadata.php
index 070dc52..dbe8654 100644
--- a/app/MetadataResolver/Metadata.php
+++ b/app/MetadataResolver/Metadata.php
@@ -2,9 +2,13 @@
 
 namespace App\MetadataResolver;
 
+use Carbon\Carbon;
+
 class Metadata
 {
     public $title = '';
     public $description = '';
     public $image = '';
+    /** @var Carbon|null */
+    public $expires_at = null;
 }
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
new file mode 100644
index 0000000..46891e1
--- /dev/null
+++ b/database/migrations/2019_01_15_143800_add_expires_on_metadata.php
@@ -0,0 +1,32 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class AddExpiresOnMetadata extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('metadata', function (Blueprint $table) {
+            $table->timestamp('expires_at')->nullable();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('metadata', function (Blueprint $table) {
+            $table->removeColumn('expires_at');
+        });
+    }
+}
diff --git a/routes/api.php b/routes/api.php
index 73e72cd..eb38041 100644
--- a/routes/api.php
+++ b/routes/api.php
@@ -26,13 +26,13 @@ Route::get('/checkin/card', function (Request $request, MetadataResolver $resolv
     $url = $formatter->normalizeUrl($request->input('url'));
 
     $metadata = App\Metadata::find($url);
-    if ($metadata == null) {
+    if ($metadata == null || ($metadata->expires_at !== null && $metadata->expires_at < now())) {
         $resolved = $resolver->resolve($url);
-        $metadata = App\Metadata::create([
-            'url' => $url,
+        $metadata = App\Metadata::updateOrCreate(['url' => $url], [
             'title' => $resolved->title,
             'description' => $resolved->description,
-            'image' => $resolved->image
+            'image' => $resolved->image,
+            'expires_at' => $resolved->expires_at
         ]);
     }