diff --git a/lib/openpgp.php b/lib/openpgp.php
index 4ce8382..29b1e0a 100644
--- a/lib/openpgp.php
+++ b/lib/openpgp.php
@@ -18,7 +18,7 @@
  * @see http://tools.ietf.org/html/rfc4880
  */
 class OpenPGP {
-  const VERSION = array(0, 3, 0);
+  const VERSION = array(0, 4, 0);
 
   /**
    * @see http://tools.ietf.org/html/rfc4880#section-6