diff --git a/cache/CacheKey.php b/cache/CacheKey.php
index 9271208..cd206e0 100644
--- a/cache/CacheKey.php
+++ b/cache/CacheKey.php
@@ -11,11 +11,11 @@
 
 class CacheKey
 {
-    
+
     protected $key;
     protected $params = '';
     protected $expire = 0;
-    
+
     /**
      * @param string $key
      * @param mixed $params
@@ -30,20 +30,20 @@ class CacheKey
         }
         $this->cache  = $cacheable->getCache();
         $this->expire = $cacheable->getKeyExpire($this->key);
-        $this->params = (is_array($params)) ? implode('', $params) : $params;
+        $this->params = (is_array($params)) ? implode('|', $params) : $params;
     }
-    
+
     protected function getCacheKey()
     {
         $params = ($this->params) ? ('_' . $this->params) : '';
         return $this->key . $params;
     }
-    
+
     protected function getExpire()
     {
         return $this->expire;
     }
-    
+
     /**
      * @param int $expire
      */
@@ -51,12 +51,12 @@ class CacheKey
     {
         $this->expire = $expire;
     }
-    
+
     public function get()
     {
-        return $this->cache->get($this->getCacheKey());        
+        return $this->cache->get($this->getCacheKey());
     }
-    
+
     /**
      * @param mixed $value
      */
@@ -64,7 +64,7 @@ class CacheKey
     {
         return $this->cache->set($this->getCacheKey(), $value, $this->expire);
     }
-    
+
     public function del()
     {
         return $this->cache->del($this->getCacheKey());