diff --git a/package.json b/package.json
index 4663004..68f6ff9 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "mip-validator",
-    "version": "1.5.12",
+    "version": "1.5.13",
     "description": "MIP validator",
     "main": "index.js",
     "dependencies": {
diff --git a/src/encoding/index.js b/src/encoding/index.js
index 93d4878..f97b203 100644
--- a/src/encoding/index.js
+++ b/src/encoding/index.js
@@ -1,4 +1,4 @@
-const jschardet = require('./fake-jschardet.js')
+const jschardet = require('jschardet')
 const ERR = require('../error/dfn.json')
 const allowedEncoding = ['UTF-8', 'ascii']
 const logger = require('../logger.js')('mip-validator:encoding')
diff --git a/test/encoding.js b/test/encoding.js
index 118811e..1c365f3 100644
--- a/test/encoding.js
+++ b/test/encoding.js
@@ -2,7 +2,9 @@ const chai = require('./chai.js')
 const expect = chai.expect
 const Validator = require('..')
 const asciiStr = 'hello'
+const ERR = require('../src/error/dfn.json')
 const utf8Str = '\xc3\xa0\xc3\xad\xc3\xa0\xc3\xa7\xc3\xa3'
+const big5Str = '\xa6\xb8\xb1\x60\xa5\xce\xb0\xea\xa6\x72\xbc\xd0\xb7\xc7\xa6\x72\xc5\xe9\xaa\xed'
 
 describe('encoding', function() {
     it('should accept ASCII', function() {
@@ -15,4 +17,10 @@ describe('encoding', function() {
         var result = validator.validate(utf8Str)
         expect(result).to.have.lengthOf(0)
     })
+    it('should reject Big5', function () {
+        var validator = Validator({})
+        var result = validator.validate(big5Str)
+        expect(result).to.have.lengthOf(1)
+        expect(result[0].code).to.equal(ERR.DISALLOWED_ENCODING.code)
+    })
 })
\ No newline at end of file