diff --git a/perl/Changes b/perl/Changes
index 50177f4d..486f1c32 100644
--- a/perl/Changes
+++ b/perl/Changes
@@ -1,3 +1,6 @@
+0.34
+
+    - do not use the corrupt my_snprintf(%ll[du]) on win32(kazuho)
 
 0.33
 
diff --git a/perl/README b/perl/README
index ae924ee6..3f25f70c 100644
--- a/perl/README
+++ b/perl/README
@@ -123,6 +123,8 @@ THANKS TO
 
     hanekomu
 
+    Kazuho Oku
+
 LICENSE
     This library is free software; you can redistribute it and/or modify it
     under the same terms as Perl itself.
diff --git a/perl/lib/Data/MessagePack.pm b/perl/lib/Data/MessagePack.pm
index 9111db0b..afe37af3 100644
--- a/perl/lib/Data/MessagePack.pm
+++ b/perl/lib/Data/MessagePack.pm
@@ -3,7 +3,7 @@ use strict;
 use warnings;
 use 5.008001;
 
-our $VERSION = '0.33';
+our $VERSION = '0.34';
 our $PreferInteger = 0;
 
 sub true () {
@@ -191,6 +191,8 @@ FURUHASHI Sadayuki
 
 hanekomu
 
+Kazuho Oku
+
 =head1 LICENSE
 
 This library is free software; you can redistribute it and/or modify