we don't use the json gem anywhere.

Gemfile.lock

@@ -1,20 +1,44 @@
 PATH
   remote: .
   specs:
-    mogbak (0.0.1)
+    mogbak (0.1.3)
+      activerecord-import (>= 0.2.9)
+      gli (>= 1.5.1)
+      mogilefs-client (>= 3.1.1)
+      mysql2 (>= 0.3.11)
+      sqlite3 (>= 1.3.5)
 
 GEM
   remote: http://rubygems.org/
   specs:
-    json (1.6.1)
-    rake (0.9.2.2)
-    rdoc (3.11)
-      json (~> 1.4)
+    activemodel (3.2.2)
+      activesupport (= 3.2.2)
+      builder (~> 3.0.0)
+    activerecord (3.2.2)
+      activemodel (= 3.2.2)
+      activesupport (= 3.2.2)
+      arel (~> 3.0.2)
+      tzinfo (~> 0.3.29)
+    activerecord-import (0.2.9)
+      activerecord (~> 3.0)
+      activerecord (~> 3.0)
+    activesupport (3.2.2)
+      i18n (~> 0.6)
+      multi_json (~> 1.0)
+    arel (3.0.2)
+    awesome_print (1.0.2)
+    builder (3.0.0)
+    gli (1.5.1)
+    i18n (0.6.0)
+    mogilefs-client (3.1.1)
+    multi_json (1.2.0)
+    mysql2 (0.3.11)
+    sqlite3 (1.3.5)
+    tzinfo (0.3.32)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
+  awesome_print
   mogbak!
-  rake
-  rdoc

mogbak.gemspec

@@ -19,9 +19,6 @@ spec = Gem::Specification.new do |s|
   s.add_runtime_dependency('gli', '>= 1.5.1')
   s.add_runtime_dependency('mysql2', '>= 0.3.11')
   s.add_runtime_dependency('mogilefs-client','>= 3.1.1')
-  s.add_runtime_dependency('json','>= 1.6.5')
   s.add_runtime_dependency('sqlite3','>=1.3.5')
   s.add_runtime_dependency('activerecord-import','>=0.2.9')
-
-
 end