diff --git a/src/app/Livewire/QuickSwitcher.php b/src/app/Livewire/QuickSwitcher.php
index 955b52e..e51b6cf 100644
--- a/src/app/Livewire/QuickSwitcher.php
+++ b/src/app/Livewire/QuickSwitcher.php
@@ -93,9 +93,9 @@ public function selectDocument()
         if (isset($results[$this->selectedIndex])) {
             $document = $results[$this->selectedIndex];
 
-            // id が存在することを確認
-            if (!empty($document['id'])) {
-                return $this->redirect(route('documents.show', $document['id']));
+            // slug が存在することを確認
+            if (!empty($document['slug'])) {
+                return $this->redirect(route('documents.show', $document['slug']));
             }
         }
     }
diff --git a/src/app/Models/Document.php b/src/app/Models/Document.php
index 44495ea..bdfb981 100644
--- a/src/app/Models/Document.php
+++ b/src/app/Models/Document.php
@@ -19,6 +19,37 @@ class Document extends Model
 {
     use SoftDeletes;
 
+    /**
+     * Get the route key for the model.
+     *
+     * @return string
+     */
+    public function getRouteKeyName(): string
+    {
+        return 'slug';
+    }
+
+    /**
+     * Retrieve the model for a bound value.
+     * Supports both slug and ID for backwards compatibility.
+     *
+     * @param  mixed  $value
+     * @param  string|null  $field
+     * @return \Illuminate\Database\Eloquent\Model|null
+     */
+    public function resolveRouteBinding($value, $field = null)
+    {
+        // First try to find by slug
+        $document = $this->where('slug', $value)->first();
+        
+        // If not found by slug, try by ID (for backwards compatibility)
+        if (!$document && is_numeric($value)) {
+            $document = $this->where('id', $value)->first();
+        }
+        
+        return $document;
+    }
+
     /**
      * The attributes that are mass assignable.
      *
diff --git a/src/resources/views/livewire/quick-switcher.blade.php b/src/resources/views/livewire/quick-switcher.blade.php
index 86c5bf1..a7e67b9 100644
--- a/src/resources/views/livewire/quick-switcher.blade.php
+++ b/src/resources/views/livewire/quick-switcher.blade.php
@@ -68,7 +68,7 @@ class="w-full pl-10 pr-4 py-3 border-0 focus:ring-0 text-lg"
                             @foreach($this->results as $index => $result)
                                 <li>
                                     <a
-                                        href="{{ route('documents.show', $result['id']) }}"
+                                        href="{{ route('documents.show', $result['slug']) }}"
                                         class="block px-4 py-3 hover:bg-gray-50 transition {{ $index === $selectedIndex ? 'bg-indigo-50' : '' }}"
                                         wire:navigate
                                         @click="open = false"