diff --git a/LICENSE b/LICENSE
index 6e95e12..eb7e8e3 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2013 mpeterv
+Copyright (c) 2013 - 2014 Peter Melnichenko
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of
 this software and associated documentation files (the "Software"), to deal in
@@ -18,3 +18,26 @@ FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+argparse includes 30log by Roland Yonaba.
+
+Copyright (c) 2012 - 2014 Roland Yonaba
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/rockspecs/argparse-scm-1.rockspec b/rockspecs/argparse-scm-1.rockspec
index bd91a58..c029224 100644
--- a/rockspecs/argparse-scm-1.rockspec
+++ b/rockspecs/argparse-scm-1.rockspec
@@ -10,8 +10,7 @@ description = {
    license = "MIT/X11"
 }
 dependencies = {
-   "lua >= 5.1, < 5.3",
-   "30log >= 0.9.1"
+   "lua >= 5.1, < 5.4"
 }
 build = {
    type = "builtin",
diff --git a/src/argparse.lua b/src/argparse.lua
index 96b000c..1de3e72 100644
--- a/src/argparse.lua
+++ b/src/argparse.lua
@@ -1,7 +1,114 @@
 local Parser, Command, Argument, Option
 
+local function require_30log()
+-------------------------------------------------------------------------------
+local assert       = assert
+local pairs        = pairs
+local type         = type
+local tostring     = tostring
+local setmetatable = setmetatable
+
+local baseMt     = {}
+local _instances = setmetatable({},{__mode='k'})
+local _classes   = setmetatable({},{__mode='k'})
+local class
+
+local function deep_copy(t, dest, aType)
+  local t = t or {}
+  local r = dest or {}
+  
+  for k,v in pairs(t) do
+    if aType and type(v)==aType then 
+      r[k] = v 
+    elseif not aType then
+      if type(v) == 'table' and k ~= "__index" then 
+        r[k] = deep_copy(v) 
+      else
+        r[k] = v
+      end
+    end
+  end
+  
+  return r
+end
+
+local function instantiate(self,...)
+  assert(_classes[self], 'new() should be called from a class.')
+  local instance = deep_copy(self)
+  _instances[instance] = tostring(instance)
+  setmetatable(instance,self)
+  
+  if self.__init then
+    if type(self.__init) == 'table' then
+      deep_copy(self.__init, instance)
+    else
+      self.__init(instance, ...)
+    end
+  end
+  
+  return instance
+end
+
+local function extends(self,extra_params)
+  local heir = {}
+  _classes[heir] = tostring(heir)
+  deep_copy(extra_params, deep_copy(self, heir))
+  heir.__index = heir
+  heir.super = self
+  return setmetatable(heir,self)
+end
+
+baseMt = {
+  __call = function (self,...)
+    return self:new(...)
+  end,
+  
+  __tostring = function(self,...)
+    if _instances[self] then
+      return 
+        ('object(of %s):<%s>')
+          :format((rawget(getmetatable(self),'__name') or '?'), _instances[self])
+    end
+    
+    return
+      _classes[self] and 
+      ('class(%s):<%s>')
+        :format((rawget(self,'__name') or '?'),_classes[self]) or 
+      self      
+  end
+}
+
+class = function(attr)
+  local c = deep_copy(attr)
+  _classes[c] = tostring(c)
+  c.include = function(self,include)
+    assert(_classes[self], 'Mixins can only be used on classes.')
+    return deep_copy(include, self, 'function')
+  end
+  
+  c.new = instantiate
+  c.extends = extends
+  c.__index = c
+  c.__call = baseMt.__call
+  c.__tostring = baseMt.__tostring
+  
+  c.is = function(self, kind)
+    local super
+    while true do 
+      super = getmetatable(super or self)
+      if super == kind or super == nil then break end
+    end
+    return kind and (super == kind)
+  end
+  return setmetatable(c, baseMt)
+end
+
+return class
+-------------------------------------------------------------------------------
+end
+
 do -- Create classes with setters
-   local class = require "30log"
+   local class = require_30log()
 
    local function add_setters(cl, fields)
       for field, setter in pairs(fields) do