diff --git a/classes/query.php b/classes/query.php
index 6c54a1b..66fd039 100644
--- a/classes/query.php
+++ b/classes/query.php
@@ -58,6 +58,18 @@ public static function rebuild($uri)
 	 */
 	protected static function _make_query($query_arr)
 	{
+		// init check function
+		$check_hash_array = function($arr)
+		{
+			foreach(array_keys($arr) as $key)
+			{
+				if(is_string($key))
+				{
+					return true;
+				}
+			}
+			return false;
+		};
 		// sort array by name asc
 		ksort($query_arr);
 		$query = array();
@@ -74,7 +86,28 @@ protected static function _make_query($query_arr)
 		// re-insert only value exists
 		foreach($query_arr as $key => $value)
 		{
-			if(strlen($value) > 0){
+			if(is_array($value))
+			{
+				// check has string key
+				$is_hash_array = $check_hash_array($value);
+				if($is_hash_array)
+				{
+					ksort($value, SORT_STRING);
+				}
+				else
+				{
+					sort($value, SORT_STRING);
+				}
+				foreach($value as $k => $v)
+				{
+					if(strlen($v) > 0)
+					{
+						$query[$key][$k] = $v;
+					}
+				}
+			}
+			elseif(strlen($value) > 0)
+			{
 				$query[$key] = $value;
 			}
 		}
@@ -82,6 +115,29 @@ protected static function _make_query($query_arr)
 		{
 			return '';
 		}
-		return '?' . http_build_query($query);
+		$return_string = '?';
+		foreach($query as $key => $value)
+		{
+			if(is_array($value))
+			{
+				$is_hash_array = $check_hash_array($value);
+				foreach($value as $k => $v)
+				{
+					if($is_hash_array)
+					{
+						$return_string .= $key.'['.$k.']='.rawurlencode($v).'&';
+					}
+					else
+					{
+						$return_string .= $key.'[]='.rawurlencode($v).'&';
+					}
+				}
+			}
+			else
+			{
+				$return_string .= $key.'='.rawurlencode($value).'&';
+			}
+		}
+		return substr($return_string, 0, -1);
 	}
 }
diff --git a/classes/seo.php b/classes/seo.php
index 0aa39e6..2d6daf8 100644
--- a/classes/seo.php
+++ b/classes/seo.php
@@ -54,7 +54,7 @@ public function __construct($request)
 		$this->_current_uri = preg_replace('/^\//', '', urldecode($_SERVER['REQUEST_URI']));
 		$this->_current_get = '';
 		$get_pos = strpos($this->_current_uri, '?');
-		if($get_pos > 0)
+		if($get_pos !== false and $get_pos >= 0)
 		{
 			$this->_current_get = substr($this->_current_uri, $get_pos, strlen($this->_current_uri) - $get_pos);
 			$this->_current_uri = substr($this->_current_uri, 0, $get_pos);
@@ -257,7 +257,7 @@ public function noindex()
 	public function canonical()
 	{
 		// not use when use noindex for seo
-		if($this->_noindex_flg === false && $this->_canonical_flg === true)
+		if($this->_noindex_flg === false and $this->_canonical_flg === true)
 		{
 			return Seo_Html::canonical($this->_canonical_uri);
 		}
diff --git a/tests/query.php b/tests/query.php
index af6cd1c..e095ae6 100644
--- a/tests/query.php
+++ b/tests/query.php
@@ -39,6 +39,39 @@ public function test_build()
 			'c' => ''
 		);
 		$this->assertEquals('fuga/hoge?a=bar&z=foo', \Seo\Query::build('fuga/hoge'));
+
+		$_GET = array(
+			'a' => array(
+				'foo',
+			),
+		);
+		$this->assertEquals('fuga/hoge?a[]=foo', \Seo\Query::build('fuga/hoge'));
+
+		$_GET = array(
+			'a' => array(
+				'foo',
+				'bar',
+			),
+		);
+		$this->assertEquals('fuga/hoge?a[]=bar&a[]=foo', \Seo\Query::build('fuga/hoge'));
+
+		$_GET = array(
+			'a' => array(
+				'aa' => 'foo',
+				'bb' => 'bar',
+			),
+		);
+		$this->assertEquals('fuga/hoge?a[aa]=foo&a[bb]=bar', \Seo\Query::build('fuga/hoge'));
+
+		$_GET = array(
+			'a' => array(
+				'aa' => 'foo',
+				'bb' => 'bar',
+				'baz',
+			),
+		);
+		$this->assertEquals('fuga/hoge?a[0]=baz&a[aa]=foo&a[bb]=bar', \Seo\Query::build('fuga/hoge'));
+
 	}
 
 	public function test_rebuild()
@@ -68,6 +101,31 @@ public function test_rebuild()
 			'?a=2&b=1',
 			\Seo\Query::rebuild('?b=1&a=2')
 		);
+		$this->assertEquals(
+			'hoge/fuga?a[]=1&a[]=2',
+			\Seo\Query::rebuild('hoge/fuga?a[]=1&a[]=2')
+		);
+		$this->assertEquals(
+			'hoge/fuga?a[]=1&a[]=2',
+			\Seo\Query::rebuild('hoge/fuga?a[]=2&a[]=1')
+		);
+		$this->assertEquals(
+			'hoge/fuga?a[]=1&a[]=2&b[]=1',
+			\Seo\Query::rebuild('hoge/fuga?a[]=1&a[]=2&b[]=1')
+		);
+		// ignore only numeric key
+		$this->assertEquals(
+			'hoge/fuga?a[]=1&a[]=2',
+			\Seo\Query::rebuild('hoge/fuga?a[0]=1&a[1]=2')
+		);
+		$this->assertEquals(
+			'hoge/fuga?a[aa]=2&a[bb]=1',
+			\Seo\Query::rebuild('hoge/fuga?a[bb]=1&a[aa]=2')
+		);
+		$this->assertEquals(
+			'hoge/fuga?a[0]=baz&a[aa]=2&a[bb]=1',
+			\Seo\Query::rebuild('hoge/fuga?a[bb]=1&a[aa]=2&a[]=baz')
+		);
 		// bug. encoded ampersand decode and resort
 		// @see https://github.com/fuel/core/issues/1608
 		$this->assertEquals(