diff --git a/app/Http/Controllers/Remote/Host/HostController.php b/app/Http/Controllers/Remote/Host/HostController.php
index cc89a52..aab8b83 100644
--- a/app/Http/Controllers/Remote/Host/HostController.php
+++ b/app/Http/Controllers/Remote/Host/HostController.php
@@ -112,13 +112,17 @@ public function update(Request $request, Host $host)
     /**
      * Remove the specified resource from storage.
      *
-     * @param  Host $host
+     * @param  $host
      * @return \Illuminate\Http\Response
      */
-    public function destroy(Host $host)
+    public function destroy($host)
     {
-        //
-        $host->delete();
+
+        $host = Host::where('id', $host)->first($host);
+
+        if ($host) {
+            $host->delete();
+        }
 
         return $this->deleted($host);
     }
diff --git a/app/Models/Host.php b/app/Models/Host.php
index 05fb365..d27d519 100644
--- a/app/Models/Host.php
+++ b/app/Models/Host.php
@@ -96,18 +96,18 @@ public function cost($price = null, $auto = true)
         $drops = $transaction->getDrops($this->user_id);
 
         if ($price !== null) {
-            $this->price = $price;
+            $real_price = $price;
         }
 
-        $this->price = round($this->price, 8);
+        $real_price = round($real_price, 8);
 
         $amount = $price / config('drops.rate') + 1;
 
         // if drops <= price
-        if ($drops < $this->price) {
+        if ($drops < $real_price) {
             try {
                 // 算出需要补充多少 Drops
-                $need = $this->price - $drops;
+                $need = $real_price - $drops;
 
                 // 算出需要补充多少余额
                 $need_amount = $need / config('drops.rate') + 1;
@@ -133,14 +133,14 @@ public function cost($price = null, $auto = true)
 
         // 统计 Host 消耗的 Drops
         if (isset($hosts_drops[$this->id])) {
-            $hosts_drops[$this->id] += $this->price;
+            $hosts_drops[$this->id] += $real_price;
         } else {
-            $hosts_drops[$this->id] = $this->price;
+            $hosts_drops[$this->id] = $real_price;
         }
 
         Cache::put($month_cache_key, $hosts_drops, 604800);
 
-        $transaction->reduceDrops($this->user_id, $this->id, $this->module_id, $auto, $this->price);
+        $transaction->reduceDrops($this->user_id, $this->id, $this->module_id, $auto, $real_price);
 
         broadcast(new UserEvent($this->user_id, 'balances.drops.reduced', $this->user));