diff --git a/.gitignore b/.gitignore
index c2635c1..ecccf38 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,3 @@
 /node_modules/
-/covreporter/
-/my_test/
+/coverage/
+/.nyc_output/
diff --git a/.npmignore b/.npmignore
new file mode 100644
index 0000000..c043496
--- /dev/null
+++ b/.npmignore
@@ -0,0 +1,8 @@
+/node_modules/
+/coverage/
+/.nyc_output/
+/tests/
+.covignore
+.travis.yml
+.npmignore
+bower.json
diff --git a/.travis.yml b/.travis.yml
index 5db325c..cea9e7f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,8 +4,7 @@ node_js:
   - "8.6.0"
 before_install:
   - npm install coveralls
-  - npm install mocha-lcov-reporter
-script: npm run-script coveralls
+after_success: npm run coveralls
 branches:
   only:
     - master
diff --git a/CHANGELOG.md b/CHANGELOG.md
index eb5e705..cf84d45 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Change Log
 
+## v0.6.0 / 2017-12-21
+### Fixed
+- incorrect result when first bit is 1 of bytes.
+
+### Changed
+- prevent webpack to require dependencies.
+
 ## v0.5.0 / 2017-10-31
 ### Fixed
 - incorrect result when file size >= 512M.
diff --git a/bower.json b/bower.json
index 5bb966b..80083f1 100644
--- a/bower.json
+++ b/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "js-sha1",
-  "version": "0.5.0",
+  "version": "0.6.0",
   "main": ["src/sha1.js"],
   "ignore": [
     "samples",
diff --git a/build/sha1.min.js b/build/sha1.min.js
index ee383c7..e20453d 100644
--- a/build/sha1.min.js
+++ b/build/sha1.min.js
@@ -1,9 +1,9 @@
 /*
  * [js-sha1]{@link https://github.com/emn178/js-sha1}
  *
- * @version 0.5.0
+ * @version 0.6.0
  * @author Chen, Yi-Cyuan [emn178@gmail.com]
  * @copyright Chen, Yi-Cyuan 2014-2017
  * @license MIT
  */
-!function(){"use strict";function t(t){t?(f[0]=f[16]=f[1]=f[2]=f[3]=f[4]=f[5]=f[6]=f[7]=f[8]=f[9]=f[10]=f[11]=f[12]=f[13]=f[14]=f[15]=0,this.blocks=f):this.blocks=[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],this.h0=1732584193,this.h1=4023233417,this.h2=2562383102,this.h3=271733878,this.h4=3285377520,this.block=this.start=this.bytes=this.hBytes=0,this.finalized=this.hashed=!1,this.first=!0}var h="object"==typeof window?window:{},s=!h.JS_SHA1_NO_NODE_JS&&"object"==typeof process&&process.versions&&process.versions.node;s&&(h=global);var i=!h.JS_SHA1_NO_COMMON_JS&&"object"==typeof module&&module.exports,e="function"==typeof define&&define.amd,r="0123456789abcdef".split(""),o=[-2147483648,8388608,32768,128],n=[24,16,8,0],a=["hex","array","digest","arrayBuffer"],f=[],u=function(h){return function(s){return new t(!0).update(s)[h]()}},c=function(){var h=u("hex");s&&(h=p(h)),h.create=function(){return new t},h.update=function(t){return h.create().update(t)};for(var i=0;i<a.length;++i){var e=a[i];h[e]=u(e)}return h},p=function(t){var h=require("crypto"),s=require("buffer").Buffer,i=function(i){if("string"==typeof i)return h.createHash("sha1").update(i,"utf8").digest("hex");if(i.constructor===ArrayBuffer)i=new Uint8Array(i);else if(void 0===i.length)return t(i);return h.createHash("sha1").update(new s(i)).digest("hex")};return i};t.prototype.update=function(t){if(!this.finalized){var s="string"!=typeof t;s&&t.constructor===h.ArrayBuffer&&(t=new Uint8Array(t));for(var i,e,r=0,o=t.length||0,a=this.blocks;o>r;){if(this.hashed&&(this.hashed=!1,a[0]=this.block,a[16]=a[1]=a[2]=a[3]=a[4]=a[5]=a[6]=a[7]=a[8]=a[9]=a[10]=a[11]=a[12]=a[13]=a[14]=a[15]=0),s)for(e=this.start;o>r&&64>e;++r)a[e>>2]|=t[r]<<n[3&e++];else for(e=this.start;o>r&&64>e;++r)i=t.charCodeAt(r),128>i?a[e>>2]|=i<<n[3&e++]:2048>i?(a[e>>2]|=(192|i>>6)<<n[3&e++],a[e>>2]|=(128|63&i)<<n[3&e++]):55296>i||i>=57344?(a[e>>2]|=(224|i>>12)<<n[3&e++],a[e>>2]|=(128|i>>6&63)<<n[3&e++],a[e>>2]|=(128|63&i)<<n[3&e++]):(i=65536+((1023&i)<<10|1023&t.charCodeAt(++r)),a[e>>2]|=(240|i>>18)<<n[3&e++],a[e>>2]|=(128|i>>12&63)<<n[3&e++],a[e>>2]|=(128|i>>6&63)<<n[3&e++],a[e>>2]|=(128|63&i)<<n[3&e++]);this.lastByteIndex=e,this.bytes+=e-this.start,e>=64?(this.block=a[16],this.start=e-64,this.hash(),this.hashed=!0):this.start=e}return this.bytes>4294967295&&(this.hBytes+=this.bytes/4294967296<<0,this.bytes=this.bytes%4294967296),this}},t.prototype.finalize=function(){if(!this.finalized){this.finalized=!0;var t=this.blocks,h=this.lastByteIndex;t[16]=this.block,t[h>>2]|=o[3&h],this.block=t[16],h>=56&&(this.hashed||this.hash(),t[0]=this.block,t[16]=t[1]=t[2]=t[3]=t[4]=t[5]=t[6]=t[7]=t[8]=t[9]=t[10]=t[11]=t[12]=t[13]=t[14]=t[15]=0),t[14]=this.hBytes<<3|this.bytes>>29,t[15]=this.bytes<<3,this.hash()}},t.prototype.hash=function(){var t,h,s,i=this.h0,e=this.h1,r=this.h2,o=this.h3,n=this.h4,a=this.blocks;for(h=16;80>h;++h)s=a[h-3]^a[h-8]^a[h-14]^a[h-16],a[h]=s<<1|s>>>31;for(h=0;20>h;h+=5)t=e&r|~e&o,s=i<<5|i>>>27,n=s+t+n+1518500249+a[h]<<0,e=e<<30|e>>>2,t=i&e|~i&r,s=n<<5|n>>>27,o=s+t+o+1518500249+a[h+1]<<0,i=i<<30|i>>>2,t=n&i|~n&e,s=o<<5|o>>>27,r=s+t+r+1518500249+a[h+2]<<0,n=n<<30|n>>>2,t=o&n|~o&i,s=r<<5|r>>>27,e=s+t+e+1518500249+a[h+3]<<0,o=o<<30|o>>>2,t=r&o|~r&n,s=e<<5|e>>>27,i=s+t+i+1518500249+a[h+4]<<0,r=r<<30|r>>>2;for(;40>h;h+=5)t=e^r^o,s=i<<5|i>>>27,n=s+t+n+1859775393+a[h]<<0,e=e<<30|e>>>2,t=i^e^r,s=n<<5|n>>>27,o=s+t+o+1859775393+a[h+1]<<0,i=i<<30|i>>>2,t=n^i^e,s=o<<5|o>>>27,r=s+t+r+1859775393+a[h+2]<<0,n=n<<30|n>>>2,t=o^n^i,s=r<<5|r>>>27,e=s+t+e+1859775393+a[h+3]<<0,o=o<<30|o>>>2,t=r^o^n,s=e<<5|e>>>27,i=s+t+i+1859775393+a[h+4]<<0,r=r<<30|r>>>2;for(;60>h;h+=5)t=e&r|e&o|r&o,s=i<<5|i>>>27,n=s+t+n-1894007588+a[h]<<0,e=e<<30|e>>>2,t=i&e|i&r|e&r,s=n<<5|n>>>27,o=s+t+o-1894007588+a[h+1]<<0,i=i<<30|i>>>2,t=n&i|n&e|i&e,s=o<<5|o>>>27,r=s+t+r-1894007588+a[h+2]<<0,n=n<<30|n>>>2,t=o&n|o&i|n&i,s=r<<5|r>>>27,e=s+t+e-1894007588+a[h+3]<<0,o=o<<30|o>>>2,t=r&o|r&n|o&n,s=e<<5|e>>>27,i=s+t+i-1894007588+a[h+4]<<0,r=r<<30|r>>>2;for(;80>h;h+=5)t=e^r^o,s=i<<5|i>>>27,n=s+t+n-899497514+a[h]<<0,e=e<<30|e>>>2,t=i^e^r,s=n<<5|n>>>27,o=s+t+o-899497514+a[h+1]<<0,i=i<<30|i>>>2,t=n^i^e,s=o<<5|o>>>27,r=s+t+r-899497514+a[h+2]<<0,n=n<<30|n>>>2,t=o^n^i,s=r<<5|r>>>27,e=s+t+e-899497514+a[h+3]<<0,o=o<<30|o>>>2,t=r^o^n,s=e<<5|e>>>27,i=s+t+i-899497514+a[h+4]<<0,r=r<<30|r>>>2;this.h0=this.h0+i<<0,this.h1=this.h1+e<<0,this.h2=this.h2+r<<0,this.h3=this.h3+o<<0,this.h4=this.h4+n<<0},t.prototype.hex=function(){this.finalize();var t=this.h0,h=this.h1,s=this.h2,i=this.h3,e=this.h4;return r[t>>28&15]+r[t>>24&15]+r[t>>20&15]+r[t>>16&15]+r[t>>12&15]+r[t>>8&15]+r[t>>4&15]+r[15&t]+r[h>>28&15]+r[h>>24&15]+r[h>>20&15]+r[h>>16&15]+r[h>>12&15]+r[h>>8&15]+r[h>>4&15]+r[15&h]+r[s>>28&15]+r[s>>24&15]+r[s>>20&15]+r[s>>16&15]+r[s>>12&15]+r[s>>8&15]+r[s>>4&15]+r[15&s]+r[i>>28&15]+r[i>>24&15]+r[i>>20&15]+r[i>>16&15]+r[i>>12&15]+r[i>>8&15]+r[i>>4&15]+r[15&i]+r[e>>28&15]+r[e>>24&15]+r[e>>20&15]+r[e>>16&15]+r[e>>12&15]+r[e>>8&15]+r[e>>4&15]+r[15&e]},t.prototype.toString=t.prototype.hex,t.prototype.digest=function(){this.finalize();var t=this.h0,h=this.h1,s=this.h2,i=this.h3,e=this.h4;return[t>>24&255,t>>16&255,t>>8&255,255&t,h>>24&255,h>>16&255,h>>8&255,255&h,s>>24&255,s>>16&255,s>>8&255,255&s,i>>24&255,i>>16&255,i>>8&255,255&i,e>>24&255,e>>16&255,e>>8&255,255&e]},t.prototype.array=t.prototype.digest,t.prototype.arrayBuffer=function(){this.finalize();var t=new ArrayBuffer(20),h=new DataView(t);return h.setUint32(0,this.h0),h.setUint32(4,this.h1),h.setUint32(8,this.h2),h.setUint32(12,this.h3),h.setUint32(16,this.h4),t};var y=c();i?module.exports=y:(h.sha1=y,e&&define(function(){return y}))}();
\ No newline at end of file
+!function(){"use strict";function t(t){t?(f[0]=f[16]=f[1]=f[2]=f[3]=f[4]=f[5]=f[6]=f[7]=f[8]=f[9]=f[10]=f[11]=f[12]=f[13]=f[14]=f[15]=0,this.blocks=f):this.blocks=[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],this.h0=1732584193,this.h1=4023233417,this.h2=2562383102,this.h3=271733878,this.h4=3285377520,this.block=this.start=this.bytes=this.hBytes=0,this.finalized=this.hashed=!1,this.first=!0}var h="object"==typeof window?window:{},s=!h.JS_SHA1_NO_NODE_JS&&"object"==typeof process&&process.versions&&process.versions.node;s&&(h=global);var i=!h.JS_SHA1_NO_COMMON_JS&&"object"==typeof module&&module.exports,e="function"==typeof define&&define.amd,r="0123456789abcdef".split(""),o=[-2147483648,8388608,32768,128],n=[24,16,8,0],a=["hex","array","digest","arrayBuffer"],f=[],u=function(h){return function(s){return new t(!0).update(s)[h]()}},c=function(){var h=u("hex");s&&(h=p(h)),h.create=function(){return new t},h.update=function(t){return h.create().update(t)};for(var i=0;i<a.length;++i){var e=a[i];h[e]=u(e)}return h},p=function(t){var h=eval("require('crypto')"),s=eval("require('buffer').Buffer"),i=function(i){if("string"==typeof i)return h.createHash("sha1").update(i,"utf8").digest("hex");if(i.constructor===ArrayBuffer)i=new Uint8Array(i);else if(void 0===i.length)return t(i);return h.createHash("sha1").update(new s(i)).digest("hex")};return i};t.prototype.update=function(t){if(!this.finalized){var s="string"!=typeof t;s&&t.constructor===h.ArrayBuffer&&(t=new Uint8Array(t));for(var i,e,r=0,o=t.length||0,a=this.blocks;r<o;){if(this.hashed&&(this.hashed=!1,a[0]=this.block,a[16]=a[1]=a[2]=a[3]=a[4]=a[5]=a[6]=a[7]=a[8]=a[9]=a[10]=a[11]=a[12]=a[13]=a[14]=a[15]=0),s)for(e=this.start;r<o&&e<64;++r)a[e>>2]|=t[r]<<n[3&e++];else for(e=this.start;r<o&&e<64;++r)(i=t.charCodeAt(r))<128?a[e>>2]|=i<<n[3&e++]:i<2048?(a[e>>2]|=(192|i>>6)<<n[3&e++],a[e>>2]|=(128|63&i)<<n[3&e++]):i<55296||i>=57344?(a[e>>2]|=(224|i>>12)<<n[3&e++],a[e>>2]|=(128|i>>6&63)<<n[3&e++],a[e>>2]|=(128|63&i)<<n[3&e++]):(i=65536+((1023&i)<<10|1023&t.charCodeAt(++r)),a[e>>2]|=(240|i>>18)<<n[3&e++],a[e>>2]|=(128|i>>12&63)<<n[3&e++],a[e>>2]|=(128|i>>6&63)<<n[3&e++],a[e>>2]|=(128|63&i)<<n[3&e++]);this.lastByteIndex=e,this.bytes+=e-this.start,e>=64?(this.block=a[16],this.start=e-64,this.hash(),this.hashed=!0):this.start=e}return this.bytes>4294967295&&(this.hBytes+=this.bytes/4294967296<<0,this.bytes=this.bytes%4294967296),this}},t.prototype.finalize=function(){if(!this.finalized){this.finalized=!0;var t=this.blocks,h=this.lastByteIndex;t[16]=this.block,t[h>>2]|=o[3&h],this.block=t[16],h>=56&&(this.hashed||this.hash(),t[0]=this.block,t[16]=t[1]=t[2]=t[3]=t[4]=t[5]=t[6]=t[7]=t[8]=t[9]=t[10]=t[11]=t[12]=t[13]=t[14]=t[15]=0),t[14]=this.hBytes<<3|this.bytes>>>29,t[15]=this.bytes<<3,this.hash()}},t.prototype.hash=function(){var t,h,s=this.h0,i=this.h1,e=this.h2,r=this.h3,o=this.h4,n=this.blocks;for(t=16;t<80;++t)h=n[t-3]^n[t-8]^n[t-14]^n[t-16],n[t]=h<<1|h>>>31;for(t=0;t<20;t+=5)s=(h=(i=(h=(e=(h=(r=(h=(o=(h=s<<5|s>>>27)+(i&e|~i&r)+o+1518500249+n[t]<<0)<<5|o>>>27)+(s&(i=i<<30|i>>>2)|~s&e)+r+1518500249+n[t+1]<<0)<<5|r>>>27)+(o&(s=s<<30|s>>>2)|~o&i)+e+1518500249+n[t+2]<<0)<<5|e>>>27)+(r&(o=o<<30|o>>>2)|~r&s)+i+1518500249+n[t+3]<<0)<<5|i>>>27)+(e&(r=r<<30|r>>>2)|~e&o)+s+1518500249+n[t+4]<<0,e=e<<30|e>>>2;for(;t<40;t+=5)s=(h=(i=(h=(e=(h=(r=(h=(o=(h=s<<5|s>>>27)+(i^e^r)+o+1859775393+n[t]<<0)<<5|o>>>27)+(s^(i=i<<30|i>>>2)^e)+r+1859775393+n[t+1]<<0)<<5|r>>>27)+(o^(s=s<<30|s>>>2)^i)+e+1859775393+n[t+2]<<0)<<5|e>>>27)+(r^(o=o<<30|o>>>2)^s)+i+1859775393+n[t+3]<<0)<<5|i>>>27)+(e^(r=r<<30|r>>>2)^o)+s+1859775393+n[t+4]<<0,e=e<<30|e>>>2;for(;t<60;t+=5)s=(h=(i=(h=(e=(h=(r=(h=(o=(h=s<<5|s>>>27)+(i&e|i&r|e&r)+o-1894007588+n[t]<<0)<<5|o>>>27)+(s&(i=i<<30|i>>>2)|s&e|i&e)+r-1894007588+n[t+1]<<0)<<5|r>>>27)+(o&(s=s<<30|s>>>2)|o&i|s&i)+e-1894007588+n[t+2]<<0)<<5|e>>>27)+(r&(o=o<<30|o>>>2)|r&s|o&s)+i-1894007588+n[t+3]<<0)<<5|i>>>27)+(e&(r=r<<30|r>>>2)|e&o|r&o)+s-1894007588+n[t+4]<<0,e=e<<30|e>>>2;for(;t<80;t+=5)s=(h=(i=(h=(e=(h=(r=(h=(o=(h=s<<5|s>>>27)+(i^e^r)+o-899497514+n[t]<<0)<<5|o>>>27)+(s^(i=i<<30|i>>>2)^e)+r-899497514+n[t+1]<<0)<<5|r>>>27)+(o^(s=s<<30|s>>>2)^i)+e-899497514+n[t+2]<<0)<<5|e>>>27)+(r^(o=o<<30|o>>>2)^s)+i-899497514+n[t+3]<<0)<<5|i>>>27)+(e^(r=r<<30|r>>>2)^o)+s-899497514+n[t+4]<<0,e=e<<30|e>>>2;this.h0=this.h0+s<<0,this.h1=this.h1+i<<0,this.h2=this.h2+e<<0,this.h3=this.h3+r<<0,this.h4=this.h4+o<<0},t.prototype.hex=function(){this.finalize();var t=this.h0,h=this.h1,s=this.h2,i=this.h3,e=this.h4;return r[t>>28&15]+r[t>>24&15]+r[t>>20&15]+r[t>>16&15]+r[t>>12&15]+r[t>>8&15]+r[t>>4&15]+r[15&t]+r[h>>28&15]+r[h>>24&15]+r[h>>20&15]+r[h>>16&15]+r[h>>12&15]+r[h>>8&15]+r[h>>4&15]+r[15&h]+r[s>>28&15]+r[s>>24&15]+r[s>>20&15]+r[s>>16&15]+r[s>>12&15]+r[s>>8&15]+r[s>>4&15]+r[15&s]+r[i>>28&15]+r[i>>24&15]+r[i>>20&15]+r[i>>16&15]+r[i>>12&15]+r[i>>8&15]+r[i>>4&15]+r[15&i]+r[e>>28&15]+r[e>>24&15]+r[e>>20&15]+r[e>>16&15]+r[e>>12&15]+r[e>>8&15]+r[e>>4&15]+r[15&e]},t.prototype.toString=t.prototype.hex,t.prototype.digest=function(){this.finalize();var t=this.h0,h=this.h1,s=this.h2,i=this.h3,e=this.h4;return[t>>24&255,t>>16&255,t>>8&255,255&t,h>>24&255,h>>16&255,h>>8&255,255&h,s>>24&255,s>>16&255,s>>8&255,255&s,i>>24&255,i>>16&255,i>>8&255,255&i,e>>24&255,e>>16&255,e>>8&255,255&e]},t.prototype.array=t.prototype.digest,t.prototype.arrayBuffer=function(){this.finalize();var t=new ArrayBuffer(20),h=new DataView(t);return h.setUint32(0,this.h0),h.setUint32(4,this.h1),h.setUint32(8,this.h2),h.setUint32(12,this.h3),h.setUint32(16,this.h4),t};var y=c();i?module.exports=y:(h.sha1=y,e&&define(function(){return y}))}();
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index 1cc7cd9..3776fb4 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,24 +4,6 @@
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
-    "amdefine": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/amdefine/-/amdefine-1.0.1.tgz",
-      "integrity": "sha1-SlKCrBZHKek2Gbz9OtFR+BfOkfU=",
-      "dev": true
-    },
-    "async": {
-      "version": "0.2.10",
-      "resolved": "https://registry.npmjs.org/async/-/async-0.2.10.tgz",
-      "integrity": "sha1-trvgsGdLnXGXCMo43owjfLUmw9E=",
-      "dev": true
-    },
-    "coffee-script": {
-      "version": "1.12.7",
-      "resolved": "https://registry.npmjs.org/coffee-script/-/coffee-script-1.12.7.tgz",
-      "integrity": "sha512-fLeEhqwymYat/MpTPUjSKHVYYl0ec2mOyALEMLmzr5i1isuG+6jfI2j2d5oBO3VIzgUXgBVIcOT9uH1TFxBckw==",
-      "dev": true
-    },
     "commander": {
       "version": "2.3.0",
       "resolved": "https://registry.npmjs.org/commander/-/commander-2.3.0.tgz",
@@ -29,12 +11,12 @@
       "dev": true
     },
     "debug": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/debug/-/debug-1.0.3.tgz",
-      "integrity": "sha1-/IxrLWACgEtAgcAgjg9kYLofo+Q=",
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-2.2.0.tgz",
+      "integrity": "sha1-+HBX6ZWxofauaklgZkE3vFbwOdo=",
       "dev": true,
       "requires": {
-        "ms": "0.6.2"
+        "ms": "0.7.1"
       }
     },
     "diff": {
@@ -43,12 +25,6 @@
       "integrity": "sha1-fyjS657nsVqX79ic5j3P2qPMur8=",
       "dev": true
     },
-    "ejs": {
-      "version": "1.0.0",
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+            },
+            "is-fullwidth-code-point": {
+              "version": "2.0.0",
+              "bundled": true,
+              "dev": true
+            },
+            "strip-ansi": {
+              "version": "4.0.0",
+              "bundled": true,
+              "dev": true,
+              "requires": {
+                "ansi-regex": "3.0.0"
+              }
+            }
+          }
+        },
+        "strip-ansi": {
+          "version": "3.0.1",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "ansi-regex": "2.1.1"
+          }
+        },
+        "strip-bom": {
+          "version": "2.0.0",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "is-utf8": "0.2.1"
+          }
+        },
+        "strip-eof": {
+          "version": "1.0.0",
+          "bundled": true,
+          "dev": true
+        },
+        "supports-color": {
+          "version": "2.0.0",
+          "bundled": true,
+          "dev": true
+        },
+        "test-exclude": {
+          "version": "4.1.1",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "arrify": "1.0.1",
+            "micromatch": "2.3.11",
+            "object-assign": "4.1.1",
+            "read-pkg-up": "1.0.1",
+            "require-main-filename": "1.0.1"
+          }
+        },
+        "to-fast-properties": {
+          "version": "1.0.3",
+          "bundled": true,
+          "dev": true
+        },
+        "trim-right": {
+          "version": "1.0.1",
+          "bundled": true,
+          "dev": true
+        },
+        "uglify-js": {
+          "version": "2.8.29",
+          "bundled": true,
+          "dev": true,
+          "optional": true,
+          "requires": {
+            "source-map": "0.5.7",
+            "uglify-to-browserify": "1.0.2",
+            "yargs": "3.10.0"
+          },
+          "dependencies": {
+            "yargs": {
+              "version": "3.10.0",
+              "bundled": true,
+              "dev": true,
+              "optional": true,
+              "requires": {
+                "camelcase": "1.2.1",
+                "cliui": "2.1.0",
+                "decamelize": "1.2.0",
+                "window-size": "0.1.0"
+              }
+            }
+          }
+        },
+        "uglify-to-browserify": {
+          "version": "1.0.2",
+          "bundled": true,
+          "dev": true,
+          "optional": true
+        },
+        "validate-npm-package-license": {
+          "version": "3.0.1",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "spdx-correct": "1.0.2",
+            "spdx-expression-parse": "1.0.4"
+          }
+        },
+        "which": {
+          "version": "1.3.0",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "isexe": "2.0.0"
+          }
+        },
+        "which-module": {
+          "version": "2.0.0",
+          "bundled": true,
+          "dev": true
+        },
+        "window-size": {
+          "version": "0.1.0",
+          "bundled": true,
+          "dev": true,
+          "optional": true
+        },
+        "wordwrap": {
+          "version": "0.0.3",
+          "bundled": true,
+          "dev": true
+        },
+        "wrap-ansi": {
+          "version": "2.1.0",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "string-width": "1.0.2",
+            "strip-ansi": "3.0.1"
+          },
+          "dependencies": {
+            "string-width": {
+              "version": "1.0.2",
+              "bundled": true,
+              "dev": true,
+              "requires": {
+                "code-point-at": "1.1.0",
+                "is-fullwidth-code-point": "1.0.0",
+                "strip-ansi": "3.0.1"
+              }
+            }
+          }
+        },
+        "wrappy": {
+          "version": "1.0.2",
+          "bundled": true,
+          "dev": true
+        },
+        "write-file-atomic": {
+          "version": "1.3.4",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "graceful-fs": "4.1.11",
+            "imurmurhash": "0.1.4",
+            "slide": "1.1.6"
+          }
+        },
+        "y18n": {
+          "version": "3.2.1",
+          "bundled": true,
+          "dev": true
+        },
+        "yallist": {
+          "version": "2.1.2",
+          "bundled": true,
+          "dev": true
+        },
+        "yargs": {
+          "version": "10.0.3",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "cliui": "3.2.0",
+            "decamelize": "1.2.0",
+            "find-up": "2.1.0",
+            "get-caller-file": "1.0.2",
+            "os-locale": "2.1.0",
+            "require-directory": "2.1.1",
+            "require-main-filename": "1.0.1",
+            "set-blocking": "2.0.0",
+            "string-width": "2.1.1",
+            "which-module": "2.0.0",
+            "y18n": "3.2.1",
+            "yargs-parser": "8.0.0"
+          },
+          "dependencies": {
+            "cliui": {
+              "version": "3.2.0",
+              "bundled": true,
+              "dev": true,
+              "requires": {
+                "string-width": "1.0.2",
+                "strip-ansi": "3.0.1",
+                "wrap-ansi": "2.1.0"
+              },
+              "dependencies": {
+                "string-width": {
+                  "version": "1.0.2",
+                  "bundled": true,
+                  "dev": true,
+                  "requires": {
+                    "code-point-at": "1.1.0",
+                    "is-fullwidth-code-point": "1.0.0",
+                    "strip-ansi": "3.0.1"
+                  }
+                }
+              }
+            }
+          }
+        },
+        "yargs-parser": {
+          "version": "8.0.0",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "camelcase": "4.1.0"
+          },
+          "dependencies": {
+            "camelcase": {
+              "version": "4.1.0",
+              "bundled": true,
+              "dev": true
+            }
+          }
+        }
+      }
+    },
+    "requirejs": {
+      "version": "2.3.5",
+      "resolved": "https://registry.npmjs.org/requirejs/-/requirejs-2.3.5.tgz",
+      "integrity": "sha512-svnO+aNcR/an9Dpi44C7KSAy5fFGLtmPbaaCeQaklUz8BQhS64tWWIIlvEA5jrWICzlO/X9KSzSeXFnZdBu8nw==",
+      "dev": true
+    },
+    "sigmund": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/sigmund/-/sigmund-1.0.1.tgz",
+      "integrity": "sha1-P/IfGYytIXX587eBhT/ZTQ0ZtZA=",
+      "dev": true
+    },
+    "source-map": {
+      "version": "0.6.1",
+      "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
+      "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
+      "dev": true
+    },
+    "supports-color": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-1.2.0.tgz",
+      "integrity": "sha1-/x7R5hFp0Gs88tWI4YixjYhH4X4=",
+      "dev": true
+    },
+    "uglify-js": {
+      "version": "3.2.2",
+      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.2.2.tgz",
+      "integrity": "sha512-++1NO/zZIEdWf6cDIGceSJQPX31SqIpbVAHwFG5+240MtZqPG/NIPoinj8zlXQtAfMBqEt1Jyv2FiLP3n9gVhQ==",
+      "dev": true,
+      "requires": {
+        "commander": "2.12.2",
+        "source-map": "0.6.1"
+      },
+      "dependencies": {
+        "commander": {
+          "version": "2.12.2",
+          "resolved": "https://registry.npmjs.org/commander/-/commander-2.12.2.tgz",
+          "integrity": "sha512-BFnaq5ZOGcDN7FlrtBT4xxkgIToalIIxwjxLWVJ8bGTpe1LroqMiqQXdA7ygc7CRvaYS+9zfPGFnJqFSayx+AA==",
+          "dev": true
+        }
+      }
     }
   }
 }
diff --git a/package.json b/package.json
index 127b305..bebea44 100644
--- a/package.json
+++ b/package.json
@@ -1,20 +1,20 @@
 {
   "name": "js-sha1",
-  "version": "0.5.0",
+  "version": "0.6.0",
   "description": "A simple SHA1 hash function for JavaScript supports UTF-8 encoding.",
   "main": "src/sha1.js",
   "devDependencies": {
     "expect.js": "~0.3.1",
-    "jscoverage": "~0.5.9",
     "mocha": "~2.3.4",
+    "nyc": "^11.3.0",
     "requirejs": "^2.1.22",
-    "uglifyjs": "~2.4.10"
+    "uglify-js": "^3.1.9"
   },
   "scripts": {
-    "test": "mocha tests/node-test.js -r jscoverage",
-    "report": "mocha tests/node-test.js -r jscoverage --covout=html",
-    "coveralls": "mocha tests/node-test.js -R mocha-lcov-reporter -r jscoverage | coveralls",
-    "build": "uglifyjs src/sha1.js --compress --mangle --comments --output build/sha1.min.js"
+    "test": "nyc mocha tests/node-test.js",
+    "report": "nyc --reporter=html --reporter=text mocha tests/node-test.js",
+    "coveralls": "nyc report --reporter=text-lcov | coveralls",
+    "build": "uglifyjs src/sha1.js -c -m eval --comments -o build/sha1.min.js"
   },
   "repository": {
     "type": "git",
@@ -32,5 +32,10 @@
   "homepage": "https://github.com/emn178/js-sha1",
   "bugs": {
     "url": "https://github.com/emn178/js-sha1/issues"
+  },
+  "nyc": {
+    "exclude": [
+      "tests"
+    ]
   }
 }
diff --git a/src/sha1.js b/src/sha1.js
index e230b58..6cd7342 100644
--- a/src/sha1.js
+++ b/src/sha1.js
@@ -1,7 +1,7 @@
 /*
  * [js-sha1]{@link https://github.com/emn178/js-sha1}
  *
- * @version 0.5.0
+ * @version 0.6.0
  * @author Chen, Yi-Cyuan [emn178@gmail.com]
  * @copyright Chen, Yi-Cyuan 2014-2017
  * @license MIT
@@ -49,8 +49,8 @@
   };
 
   var nodeWrap = function (method) {
-    var crypto = require('crypto');
-    var Buffer = require('buffer').Buffer;
+    var crypto = eval("require('crypto')");
+    var Buffer = eval("require('buffer').Buffer");
     var nodeMethod = function (message) {
       if (typeof message === 'string') {
         return crypto.createHash('sha1').update(message, 'utf8').digest('hex');
@@ -169,7 +169,7 @@
       blocks[8] = blocks[9] = blocks[10] = blocks[11] =
       blocks[12] = blocks[13] = blocks[14] = blocks[15] = 0;
     }
-    blocks[14] = this.hBytes << 3 | this.bytes >> 29;
+    blocks[14] = this.hBytes << 3 | this.bytes >>> 29;
     blocks[15] = this.bytes << 3;
     this.hash();
   };