diff --git a/Gemfile.lock b/Gemfile.lock
index fc55b94..6e37509 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -10,8 +10,8 @@ GEM
     hashie (1.2.0)
     hoe (3.1.0)
       rake (~> 0.8)
-    json (1.7.4)
-    json (1.7.4-java)
+    json (1.7.5)
+    json (1.7.5-java)
     multi_json (1.3.6)
     multipart-post (1.1.5)
     newgem (1.5.3)
diff --git a/History.txt b/History.txt
index ec230f5..181cf50 100644
--- a/History.txt
+++ b/History.txt
@@ -1,3 +1,7 @@
+=== 0.2.4 2012-10-06
+
+* require json
+
 === 0.2.3 2012-10-06
 
 * parallel request twitter API
diff --git a/Rakefile b/Rakefile
index 7d9c68f..2c635a8 100644
--- a/Rakefile
+++ b/Rakefile
@@ -17,6 +17,7 @@ $hoe = Hoe.spec 'tw' do
   self.extra_deps         = [['oauth','>= 0.4.7', '< 1.0.0'],
                              ['twitter', '>= 4.0.0', '< 5.0.0'],
                              ['userstream', '>= 1.2.0', '< 1.3.0'],
+                             ['json', '>= 1.7.5', '< 1.8.0'],
                              ['args_parser', '>= 0.1.0'],
                              ['rainbow', '>= 1.1.4', '< 2.0.0'],
                              ['parallel', '>= 0.5.18', '< 1.0.0']]
diff --git a/lib/tw.rb b/lib/tw.rb
index c170500..4028716 100644
--- a/lib/tw.rb
+++ b/lib/tw.rb
@@ -18,7 +18,7 @@
 require 'tw/client/error'
 
 module Tw
-  VERSION = '0.2.3'
+  VERSION = '0.2.4'
   class Conf
     REQUIRE_VERSION = '0.1.0'
   end