diff --git a/config.php b/config.php
index 20108aa..b4cabca 100644
--- a/config.php
+++ b/config.php
@@ -14,5 +14,12 @@ class redditConfig{
     //access token request scopes
     //full list at http://www.reddit.com/dev/api/oauth
     static $SCOPES = 'save,modposts,identity,edit,flair,history,modconfig,modflair,modlog,modposts,modwiki,mysubreddits,privatemessages,read,report,submit,subscribe,vote,wikiedit,wikiread';
+        
+    // for permanent token - refresh token
+    
+    // https://www.reddit.com/r/redditdev/comments/3g8u2t/how_to_get_permanent_access_token_for_reddit/
+    static $GRANT_TYPE = 'authorization_code';
+    static $GRANT_TYPE_REFRESH = 'refresh_token';
+    static $DURATION = 'permanent';
 }
 ?>
diff --git a/reddit.php b/reddit.php
index 3474a06..58fe52a 100644
--- a/reddit.php
+++ b/reddit.php
@@ -11,6 +11,7 @@
 */
 class reddit{
     private $access_token;
+    private $refresh_token;
     private $token_type;
     private $auth_mode = 'basic';
     
@@ -30,10 +31,13 @@ public function __construct(){
                 //capture code from auth
                 $code = $_GET["code"];
                 
-                //construct POST object for access token fetch request
-                $postvals = sprintf("code=%s&redirect_uri=%s&grant_type=authorization_code",
+                //construct POST object for access token fetch request - permanent token
+                $postvals = sprintf("code=%s&redirect_uri=%s&grant_type=%s&duration=%s",
                                     $code,
-                                    redditConfig::$ENDPOINT_OAUTH_REDIRECT);
+                                    redditConfig::$ENDPOINT_OAUTH_REDIRECT,
+                                    redditConfig::$GRANT_TYPE,
+                                    redditConfig::$DURATION
+                                );
                 
                 //get JSON access token object (with refresh_token parameter)
                 $token = self::runCurl(redditConfig::$ENDPOINT_OAUTH_TOKEN, $postvals, null, true);
@@ -42,6 +46,7 @@ public function __construct(){
                 if (isset($token->access_token)){
                     $this->access_token = $token->access_token;
                     $this->token_type = $token->token_type;
+                    $this->refresh_token = $token->refresh_token;
                     
                     //set token cookie for later use
                     $cookie_time = 60 * 59 + time();  //seconds * minutes = 59 minutes (token expires in 1hr) 
@@ -67,6 +72,33 @@ public function __construct(){
         //set auth mode for requests
         $this->auth_mode = 'oauth';
     }
+
+    /* refresh token */
+    public function getAccessTokenRefresh($refresh_token=''){
+
+        // if refresh token not exists return
+        if($refresh_token) $this->refresh_token = $refresh_token;
+        else return false;
+        
+        $this->auth_mode = 'basic';
+
+        $postvals = sprintf("grant_type=%s&refresh_token=%s",
+                        redditConfig::$GRANT_TYPE_REFRESH,
+                        $this->refresh_token
+                    );
+
+        $token = self::runCurl(redditConfig::$ENDPOINT_OAUTH_TOKEN, $postvals, null, true);
+        
+        if (isset($token->access_token)){
+            $this->access_token = $token->access_token;
+            $this->token_type = $token->token_type;
+            $cookie_time = 60 * 59 + time();  //seconds * minutes = 59 minutes (token expires in 1hr) 
+            setcookie('reddit_token', "{$this->token_type}:{$this->access_token}", $cookie_time); 
+        }
+
+        $this->auth_mode = 'oauth';
+
+    }
     
     /**
     * Needs CAPTCHA