diff --git a/src/Monolog/Formatter/LogstashFormatter.php b/src/Monolog/Formatter/LogstashFormatter.php
index 7aa8ad33..f8839595 100644
--- a/src/Monolog/Formatter/LogstashFormatter.php
+++ b/src/Monolog/Formatter/LogstashFormatter.php
@@ -21,6 +21,10 @@ namespace Monolog\Formatter;
  */
 class LogstashFormatter extends NormalizerFormatter
 {
+
+    const V0 = 0;
+    const V1 = 1;
+
     /**
      * @var string the name of the system for the Logstash log message, used to fill the @source field
      */
@@ -41,13 +45,18 @@ class LogstashFormatter extends NormalizerFormatter
      */
     protected $contextPrefix;
 
+    /**
+     * @var integer LogStash format version to use
+     */
+    protected $version;
+
     /**
      * @param string $applicationName the application that sends the data, used as the "type" field of logstash
      * @param string $systemName      the system/machine name, used as the "source" field of logstash, defaults to the hostname of the machine
      * @param string $extraPrefix     prefix for extra keys inside logstash "fields"
      * @param string $contextPrefix   prefix for context keys inside logstash "fields", defaults to ctxt_
      */
-    public function __construct($applicationName, $systemName = null, $extraPrefix = null, $contextPrefix = 'ctxt_')
+    public function __construct($applicationName, $systemName = null, $extraPrefix = null, $contextPrefix = 'ctxt_', $version = self::V0)
     {
         //log stash requires a ISO 8601 format date
         parent::__construct('c');
@@ -57,6 +66,8 @@ class LogstashFormatter extends NormalizerFormatter
 
         $this->extraPrefix = $extraPrefix;
         $this->contextPrefix = $contextPrefix;
+
+        $this->version = $version;
     }
 
     /**
@@ -65,19 +76,36 @@ class LogstashFormatter extends NormalizerFormatter
     public function format(array $record)
     {
         $record = parent::format($record);
+
+        switch ($this->version) {
+            case self::V1:
+                $message = $this->formatV1($record);
+                break;
+            case self::V0:
+            default:
+                $message = $this->formatV0($record);
+                break;
+        }
+
+        return $this->toJson($message) . "\n";
+    }
+
+    protected function formatV0(array $record)
+    {
         $message = array(
             '@timestamp' => $record['datetime'],
             '@message' => $record['message'],
             '@tags' => array($record['channel']),
-            '@source' => $this->systemName
+            '@source' => $this->systemName,
+            '@fields' => array(
+                'channel' => $record['channel'],
+                'level' => $record['level']
+            )
         );
 
         if ($this->applicationName) {
             $message['@type'] = $this->applicationName;
         }
-        $message['@fields'] = array();
-        $message['@fields']['channel'] = $record['channel'];
-        $message['@fields']['level'] = $record['level'];
 
         if (isset($record['extra']['server'])) {
             $message['@source_host'] = $record['extra']['server'];
@@ -93,6 +121,33 @@ class LogstashFormatter extends NormalizerFormatter
             $message['@fields'][$this->contextPrefix . $key] = $val;
         }
 
-        return json_encode($message) . "\n";
+        return $message;
+    }
+
+    protected function formatV1(array $record)
+    {
+        $message = array(
+            '@timestamp' => $record['datetime'],
+            '@version' => 1,
+            'message' => $record['message'],
+            'host' => $this->systemName,
+            'type' => $record['channel'],
+            'channel' => $record['channel'],
+            'level' => $record['level_name']
+        );
+
+        if ($this->applicationName) {
+            $message['type'] = $this->applicationName;
+        }
+
+        foreach ($record['extra'] as $key => $val) {
+            $message[$this->extraPrefix . $key] = $val;
+        }
+
+        foreach ($record['context'] as $key => $val) {
+            $message[$this->contextPrefix . $key] = $val;
+        }
+
+        return $message;
     }
 }
diff --git a/tests/Monolog/Formatter/LogstashFormatterTest.php b/tests/Monolog/Formatter/LogstashFormatterTest.php
index 6b012dea..4fb5b3b2 100644
--- a/tests/Monolog/Formatter/LogstashFormatterTest.php
+++ b/tests/Monolog/Formatter/LogstashFormatterTest.php
@@ -157,4 +157,138 @@ class LogstashFormatterTest extends \PHPUnit_Framework_TestCase
         $this->assertArrayHasKey('@type', $message);
         $this->assertEquals('app', $message['@type']);
     }
+
+
+    /**
+     * @covers Monolog\Formatter\LogstashFormatter::format
+     */
+    public function testDefaultFormatterV1()
+    {
+        $formatter = new LogstashFormatter('test', 'hostname', null, 'ctxt_', LogstashFormatter::V1);
+        $record = array(
+            'level' => Logger::ERROR,
+            'level_name' => 'ERROR',
+            'channel' => 'meh',
+            'context' => array(),
+            'datetime' => new \DateTime("@0"),
+            'extra' => array(),
+            'message' => 'log',
+        );
+
+        $message = json_decode($formatter->format($record), true);
+
+        $this->assertEquals("1970-01-01T00:00:00+00:00", $message['@timestamp']);
+        $this->assertEquals("1", $message['@version']);
+        $this->assertEquals('log', $message['message']);
+        $this->assertEquals('meh', $message['channel']);
+        $this->assertEquals('ERROR', $message['level']);
+        $this->assertEquals('test', $message['type']);
+        $this->assertEquals('hostname', $message['host']);
+
+        $formatter = new LogstashFormatter('mysystem', null, null, 'ctxt_', LogstashFormatter::V1);
+
+        $message = json_decode($formatter->format($record), true);
+
+        $this->assertEquals('mysystem', $message['type']);
+    }
+
+    /**
+     * @covers Monolog\Formatter\LogstashFormatter::format
+     */
+    public function testFormatWithFileAndLineV1()
+    {
+        $formatter = new LogstashFormatter('test', null, null, 'ctxt_', LogstashFormatter::V1);
+        $record = array(
+            'level' => Logger::ERROR,
+            'level_name' => 'ERROR',
+            'channel' => 'meh',
+            'context' => array('from' => 'logger'),
+            'datetime' => new \DateTime("@0"),
+            'extra' => array('file' => 'test', 'line' => 14),
+            'message' => 'log',
+        );
+
+        $message = json_decode($formatter->format($record), true);
+
+        $this->assertEquals('test', $message['file']);
+        $this->assertEquals(14, $message['line']);
+    }
+
+    /**
+     * @covers Monolog\Formatter\LogstashFormatter::format
+     */
+    public function testFormatWithContextV1()
+    {
+        $formatter = new LogstashFormatter('test', null, null, 'ctxt_', LogstashFormatter::V1);
+        $record = array(
+            'level' => Logger::ERROR,
+            'level_name' => 'ERROR',
+            'channel' => 'meh',
+            'context' => array('from' => 'logger'),
+            'datetime' => new \DateTime("@0"),
+            'extra' => array('key' => 'pair'),
+            'message' => 'log'
+        );
+
+        $message = json_decode($formatter->format($record), true);
+
+        $this->assertArrayHasKey('ctxt_from', $message);
+        $this->assertEquals('logger', $message['ctxt_from']);
+
+        // Test with extraPrefix
+        $formatter = new LogstashFormatter('test', null, null, 'CTX', LogstashFormatter::V1);
+        $message = json_decode($formatter->format($record), true);
+
+        $this->assertArrayHasKey('CTXfrom', $message);
+        $this->assertEquals('logger', $message['CTXfrom']);
+
+    }
+
+    /**
+     * @covers Monolog\Formatter\LogstashFormatter::format
+     */
+    public function testFormatWithExtraV1()
+    {
+        $formatter = new LogstashFormatter('test', null, null, 'ctxt_', LogstashFormatter::V1);
+        $record = array(
+            'level' => Logger::ERROR,
+            'level_name' => 'ERROR',
+            'channel' => 'meh',
+            'context' => array('from' => 'logger'),
+            'datetime' => new \DateTime("@0"),
+            'extra' => array('key' => 'pair'),
+            'message' => 'log'
+        );
+
+        $message = json_decode($formatter->format($record), true);
+
+        $this->assertArrayHasKey('key', $message);
+        $this->assertEquals('pair', $message['key']);
+
+        // Test with extraPrefix
+        $formatter = new LogstashFormatter('test', null, 'EXT', 'ctxt_', LogstashFormatter::V1);
+        $message = json_decode($formatter->format($record), true);
+
+        $this->assertArrayHasKey('EXTkey', $message);
+        $this->assertEquals('pair', $message['EXTkey']);
+    }
+
+    public function testFormatWithApplicationNameV1()
+    {
+        $formatter = new LogstashFormatter('app', 'test', null, 'ctxt_', LogstashFormatter::V1);
+        $record = array(
+            'level' => Logger::ERROR,
+            'level_name' => 'ERROR',
+            'channel' => 'meh',
+            'context' => array('from' => 'logger'),
+            'datetime' => new \DateTime("@0"),
+            'extra' => array('key' => 'pair'),
+            'message' => 'log'
+        );
+
+        $message = json_decode($formatter->format($record), true);
+
+        $this->assertArrayHasKey('type', $message);
+        $this->assertEquals('app', $message['type']);
+    }
 }