diff --git a/lib/Slic3r.pm b/lib/Slic3r.pm
index 507b67c07..f00eaddeb 100644
--- a/lib/Slic3r.pm
+++ b/lib/Slic3r.pm
@@ -3,7 +3,7 @@ package Slic3r;
 use strict;
 use warnings;
 
-our $VERSION = "0.5.0";
+our $VERSION = "0.5.1beta";
 
 our $debug = 0;
 sub debugf {