diff --git a/perl/Changes b/perl/Changes
index 15603ea1..1a51ddf0 100644
--- a/perl/Changes
+++ b/perl/Changes
@@ -1,3 +1,7 @@
+0.06
+
+    - use SvNOK.
+
 0.05
 
     - change type detection for old perl
diff --git a/perl/lib/Data/MessagePack.pm b/perl/lib/Data/MessagePack.pm
index 46fb45d9..be22203b 100644
--- a/perl/lib/Data/MessagePack.pm
+++ b/perl/lib/Data/MessagePack.pm
@@ -4,7 +4,7 @@ use warnings;
 use XSLoader;
 use 5.008001;
 
-our $VERSION = '0.05';
+our $VERSION = '0.06';
 our $PreferInteger = 0;
 
 XSLoader::load(__PACKAGE__, $VERSION);