diff --git a/cptable.js b/cptable.js
index 1f1709e..849c0c9 100644
--- a/cptable.js
+++ b/cptable.js
@@ -833,4 +833,4 @@ cptable[28606] = (function(){ var d = "\u0000\u0001\u0002\u0003\u0004\u0005\u000
 cptable[858] = (function(){ var d = "\u0000\u0001\u0002\u0003\u0004\u0005\u0006\u0007\b\t\n\u000b\f\r\u000e\u000f\u0010\u0011\u0012\u0013\u0014\u0015\u0016\u0017\u0018\u0019\u001a\u001b\u001c\u001d\u001e\u001f !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~ÇüéâäàåçêëèïîìÄÅÉæÆôöòûùÿÖÜø£Ø׃áíóúñѪº¿®¬½¼¡«»░▒▓│┤ÁÂÀ©╣║╗╝¢¥┐└┴┬├─┼ãÃ╚╔╩╦╠═╬¤ðÐÊËÈ€ÍÎÏ┘┌█▄¦Ì▀ÓßÔÒõÕµþÞÚÛÙýݯ´­±‗¾¶§÷¸°¨·¹³²■ ".split(""), e = {}; for(var i=0;i!=d.length;++i) if(d[i].charCodeAt(0) !== 0xFFFD)e[d[i]] = i; return {"enc": e, "dec": d }; })();
 cptable[708] = (function(){ var d = "\u0000\u0001\u0002\u0003\u0004\u0005\u0006\u0007\b\t\n\u000b\f\r\u000e\u000f\u0010\u0011\u0012\u0013\u0014\u0015\u0016\u0017\u0018\u0019\u001a\u001b\u001c\u001d\u001e\u001f !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~│┤éâ╡à╢çêëèïî╖╕╣║╗╝ô╜╛ûù┐└�������┴┬├¤─┼╞╟╚╔╩،╦«»░▒▓╠═╬╧╨╤╥╙؛╘╒╓؟╫ءآأؤإئابةتثجحخدذرزسشصضطظعغ█▄▌▐▀ـفقكلمنهوىيًٌٍَُِّْ������╪┘┌µ£■ ".split(""), e = {}; for(var i=0;i!=d.length;++i) if(d[i].charCodeAt(0) !== 0xFFFD)e[d[i]] = i; return {"enc": e, "dec": d }; })();
 cptable[720] = (function(){ var d = "\u0000\u0001\u0002\u0003\u0004\u0005\u0006\u0007\b\t\n\u000b\f\r\u000e\u000f\u0010\u0011\u0012\u0013\u0014\u0015\u0016\u0017\u0018\u0019\u001a\u001b\u001c\u001d\u001e\u001f !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~��éâ�à�çêëèïî����ّْô¤ـûùءآأؤ£إئابةتثجحخدذرزسشص«»░▒▓│┤╡╢╖╕╣║╗╝╜╛┐└┴┬├─┼╞╟╚╔╩╦╠═╬╧╨╤╥╙╘╒╓╫╪┘┌█▄▌▐▀ضطظعغفµقكلمنهوىي≡ًٌٍَُِ≈°∙·√ⁿ²■ ".split(""), e = {}; for(var i=0;i!=d.length;++i) if(d[i].charCodeAt(0) !== 0xFFFD)e[d[i]] = i; return {"enc": e, "dec": d }; })();
-if(typeof module !== 'undefined') module.exports = cptable;
+if (typeof module !== 'undefined' && module.exports) module.exports = cptable;
diff --git a/cputils.js b/cputils.js
index b0c73c8..8dc39b3 100644
--- a/cputils.js
+++ b/cputils.js
@@ -1,6 +1,16 @@
-if(typeof cptable === "undefined" && typeof require !== "undefined") var cptable = require('./cptable');
-
-(function(cpt){
+(function(root, factory){
+    "use strict";
+    if(typeof cptable === "undefined" && typeof require !== "undefined"){
+        var cpt = require('./cptable');
+        if (typeof module !== 'undefined' && module.exports){
+            module.exports = factory(cpt);
+        }else{
+            root.cptable = factory(cpt);
+        }
+    }else{
+        throw "cptable not found";
+    }
+}(this, function(cpt){
   var magic = {
     "1200":"utf16le",
     "1201":"utf16be",
@@ -72,6 +82,6 @@ if(typeof cptable === "undefined" && typeof require !== "undefined") var cptable
     return cpt[cp] || magic[cp];
   };
   cpt.utils = { decode: decode, encode: encode, hascp: hascp, magic: magic };
-})(cptable);
+  return cpt;
+}));
 
-if(typeof module !== "undefined") module.exports = cptable;
diff --git a/sbcs.js b/sbcs.js
index 40d28c8..2708323 100644
--- a/sbcs.js
+++ b/sbcs.js
@@ -53,4 +53,4 @@ cptable[28606] = (function(){ var d = "\u0000\u0001\u0002\u0003\u0004\u0005\u000
 cptable[858] = (function(){ var d = "\u0000\u0001\u0002\u0003\u0004\u0005\u0006\u0007\b\t\n\u000b\f\r\u000e\u000f\u0010\u0011\u0012\u0013\u0014\u0015\u0016\u0017\u0018\u0019\u001a\u001b\u001c\u001d\u001e\u001f !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~ÇüéâäàåçêëèïîìÄÅÉæÆôöòûùÿÖÜø£Ø׃áíóúñѪº¿®¬½¼¡«»░▒▓│┤ÁÂÀ©╣║╗╝¢¥┐└┴┬├─┼ãÃ╚╔╩╦╠═╬¤ðÐÊËÈ€ÍÎÏ┘┌█▄¦Ì▀ÓßÔÒõÕµþÞÚÛÙýݯ´­±‗¾¶§÷¸°¨·¹³²■ ".split(""), e = {}; for(var i=0;i!=d.length;++i) if(d[i].charCodeAt(0) !== 0xFFFD)e[d[i]] = i; return {"enc": e, "dec": d }; })();
 cptable[708] = (function(){ var d = "\u0000\u0001\u0002\u0003\u0004\u0005\u0006\u0007\b\t\n\u000b\f\r\u000e\u000f\u0010\u0011\u0012\u0013\u0014\u0015\u0016\u0017\u0018\u0019\u001a\u001b\u001c\u001d\u001e\u001f !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~│┤éâ╡à╢çêëèïî╖╕╣║╗╝ô╜╛ûù┐└�������┴┬├¤─┼╞╟╚╔╩،╦«»░▒▓╠═╬╧╨╤╥╙؛╘╒╓؟╫ءآأؤإئابةتثجحخدذرزسشصضطظعغ█▄▌▐▀ـفقكلمنهوىيًٌٍَُِّْ������╪┘┌µ£■ ".split(""), e = {}; for(var i=0;i!=d.length;++i) if(d[i].charCodeAt(0) !== 0xFFFD)e[d[i]] = i; return {"enc": e, "dec": d }; })();
 cptable[720] = (function(){ var d = "\u0000\u0001\u0002\u0003\u0004\u0005\u0006\u0007\b\t\n\u000b\f\r\u000e\u000f\u0010\u0011\u0012\u0013\u0014\u0015\u0016\u0017\u0018\u0019\u001a\u001b\u001c\u001d\u001e\u001f !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~��éâ�à�çêëèïî����ّْô¤ـûùءآأؤ£إئابةتثجحخدذرزسشص«»░▒▓│┤╡╢╖╕╣║╗╝╜╛┐└┴┬├─┼╞╟╚╔╩╦╠═╬╧╨╤╥╙╘╒╓╫╪┘┌█▄▌▐▀ضطظعغفµقكلمنهوىي≡ًٌٍَُِ≈°∙·√ⁿ²■ ".split(""), e = {}; for(var i=0;i!=d.length;++i) if(d[i].charCodeAt(0) !== 0xFFFD)e[d[i]] = i; return {"enc": e, "dec": d }; })();
-if(typeof module !== 'undefined') module.exports = cptable;
+if (typeof module !== 'undefined' && module.exports) module.exports = cptable;