diff --git a/lib/NGCP/Schema/Storage/DateTime/Format/MySQL.pm b/lib/NGCP/Schema/Storage/DateTime/Format/MySQL.pm
index 54b1efbc..2d5a318a 100644
--- a/lib/NGCP/Schema/Storage/DateTime/Format/MySQL.pm
+++ b/lib/NGCP/Schema/Storage/DateTime/Format/MySQL.pm
@@ -3,9 +3,7 @@ package NGCP::Schema::Storage::DateTime::Format::MySQL;
 use strict;
 use warnings;
 
-use vars qw ($VERSION);
-
-$VERSION = '0.06';
+our $VERSION = '0.06';
 
 use base ("DateTime::Format::MySQL");