diff --git a/Changes b/Changes
index 947f86c..fb8ef47 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,13 @@ Revision history for Perl extension Unqlite
 
 {{$NEXT}}
 
+0.02 2013-07-05T06:42:59Z
+
+    - Store RC to magic to fix race condition
+      (charsbar)
+    - Added `tie` interface.
+      (charsbar)
+
 0.01 2013-07-03T19:02:44Z
 
     - original version
diff --git a/META.json b/META.json
index 7c579f9..a49c33f 100644
--- a/META.json
+++ b/META.json
@@ -63,5 +63,8 @@
          "web" : "https://github.com/tokuhirom/UnQLite"
       }
    },
-   "version" : "0.01"
+   "version" : "0.02",
+   "x_contributors" : [
+      "Kenichi Ishigaki <ishigaki@cpan.org>"
+   ]
 }
diff --git a/README.md b/README.md
index 91251a1..1286c87 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,11 @@ UnQLite - Perl bindings for UnQLite
     $db->kv_delete('foo');
     undef $db; # close database
 
+    # tie interface
+    tie my %hash, 'UnQLite', 'foo.db';
+    $hash{foo} = 'bar';
+    say $hash{foo}; # => bar
+
 # DESCRIPTION
 
 UnQLite is a in-process software library which implements a self-contained, serverless, zero-configuration, transactional NoSQL database engine. UnQLite is a document store database similar to MongoDB, Redis, CouchDB etc. as well a standard Key/Value store similar to BerkeleyDB, LevelDB, etc.  
diff --git a/lib/UnQLite.pm b/lib/UnQLite.pm
index c490944..0fb5a71 100644
--- a/lib/UnQLite.pm
+++ b/lib/UnQLite.pm
@@ -4,7 +4,7 @@ use strict;
 use warnings;
 use Carp ();
 
-our $VERSION = "0.01";
+our $VERSION = "0.02";
 our $rc = 0;
 
 use XSLoader;