diff --git a/README.md b/README.md
index 04b6fc41..8d77f87e 100644
--- a/README.md
+++ b/README.md
@@ -104,7 +104,7 @@ QRCode.toCanvas(canvas, 'sample text', function (error) {
 ```html
 <canvas id="canvas"></canvas>
 
-<script src="/build/qrcode.min.js"></script>
+<script src="/build/qrcode.js"></script>
 <script>
   QRCode.toCanvas(document.getElementById('canvas'), 'sample text', function (error) {
     if (error) console.error(error)
@@ -113,7 +113,9 @@ QRCode.toCanvas(canvas, 'sample text', function (error) {
 </script>
 ```
 
-If you install through `npm`, precompiled files will be available in `node_modules/qrcode/build/` folder.<br>
+If you install through `npm`, precompiled files will be available in `node_modules/qrcode/build/` folder.
+
+The precompiled bundle have support for [Internet Explorer 10+, Safari 5.1+, and all evergreen browsers](https://browserl.ist/?q=defaults%2C+IE+%3E%3D+10%2C+Safari+%3E%3D+5.1).
 
 ### NodeJS
 Require the module `qrcode`
@@ -347,7 +349,7 @@ QRCode.toFile(
 )
 ```
 
-TypeScript users: if you are using [@types/qrcode](https://www.npmjs.com/package/@types/qrcode), you will need to add a `// @ts-ignore` above the data segment because it expects `data: string`. 
+TypeScript users: if you are using [@types/qrcode](https://www.npmjs.com/package/@types/qrcode), you will need to add a `// @ts-ignore` above the data segment because it expects `data: string`.
 
 ## Multibyte characters
 Support for multibyte characters isn't present in the initial QR Code standard, but is possible to encode UTF-8 characters in Byte mode.
diff --git a/build.js b/build.js
deleted file mode 100644
index 7ef09d0c..00000000
--- a/build.js
+++ /dev/null
@@ -1,52 +0,0 @@
-const childProcess = require('child_process')
-const fs = require('fs')
-const path = require('path')
-
-require('colors')
-
-function createFolder (folderPath) {
-  console.log('*'.green + ' creating folder: '.grey + folderPath.white)
-
-  fs.mkdirSync(folderPath, { recursive: true })
-}
-
-function bundle (inputFile, exportName, outputFile, onDone) {
-  console.log('*'.green + ' bundling: '.grey + inputFile.white + ' -> '.grey + outputFile.white)
-
-  const { status, stderr } = childProcess.spawnSync('node', [
-    'node_modules/.bin/browserify',
-    inputFile,
-    '-s', exportName,
-    '-d',
-    '-o', outputFile
-  ])
-
-  if (status !== 0) {
-    console.error(stderr.toString())
-    process.exit(status)
-  }
-}
-
-function minify (inputFile, outputFile) {
-  console.log('*'.green + ' minifying: '.grey + inputFile.white + ' -> '.grey + outputFile.white)
-
-  const { status, stderr } = childProcess.spawnSync('node', [
-    'node_modules/.bin/uglifyjs',
-    '--compress', '--mangle',
-    '--output', outputFile,
-    '--source-map', `url='${path.basename(outputFile)}.map'`,
-    '--', inputFile
-  ])
-
-  if (status !== 0) {
-    console.error(stderr.toString())
-    process.exit(status)
-  }
-}
-
-createFolder('./build')
-bundle('lib/index.js', 'QRCode', 'build/qrcode.js')
-bundle('helper/to-sjis.js', 'QRCode.toSJIS', 'build/qrcode.tosjis.js')
-minify('build/qrcode.js', 'build/qrcode.min.js')
-minify('build/qrcode.tosjis.js', 'build/qrcode.tosjis.min.js')
-console.log('\nBuild complete =)\n'.green)
diff --git a/helper/to-sjis-browser.js b/helper/to-sjis-browser.js
new file mode 100644
index 00000000..1c9b3aa7
--- /dev/null
+++ b/helper/to-sjis-browser.js
@@ -0,0 +1,2 @@
+/* global QRCode */
+QRCode.toSJIS = require('./to-sjis')
diff --git a/package-lock.json b/package-lock.json
index 7cbb6965..e94c96af 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13,6 +13,52 @@
         "@babel/highlight": "^7.8.3"
       }
     },
+    "@babel/compat-data": {
+      "version": "7.9.0",
+      "resolved": "https://registry.npmjs.org/@babel/compat-data/-/compat-data-7.9.0.tgz",
+      "integrity": "sha512-zeFQrr+284Ekvd9e7KAX954LkapWiOmQtsfHirhxqfdlX6MEC32iRE+pqUGlYIBchdevaCwvzxWGSy/YBNI85g==",
+      "dev": true,
+      "requires": {
+        "browserslist": "^4.9.1",
+        "invariant": "^2.2.4",
+        "semver": "^5.5.0"
+      }
+    },
+    "@babel/core": {
+      "version": "7.9.0",
+      "resolved": "https://registry.npmjs.org/@babel/core/-/core-7.9.0.tgz",
+      "integrity": "sha512-kWc7L0fw1xwvI0zi8OKVBuxRVefwGOrKSQMvrQ3dW+bIIavBY3/NpXmpjMy7bQnLgwgzWQZ8TlM57YHpHNHz4w==",
+      "dev": true,
+      "requires": {
+        "@babel/code-frame": "^7.8.3",
+        "@babel/generator": "^7.9.0",
+        "@babel/helper-module-transforms": "^7.9.0",
+        "@babel/helpers": "^7.9.0",
+        "@babel/parser": "^7.9.0",
+        "@babel/template": "^7.8.6",
+        "@babel/traverse": "^7.9.0",
+        "@babel/types": "^7.9.0",
+        "convert-source-map": "^1.7.0",
+        "debug": "^4.1.0",
+        "gensync": "^1.0.0-beta.1",
+        "json5": "^2.1.2",
+        "lodash": "^4.17.13",
+        "resolve": "^1.3.2",
+        "semver": "^5.4.1",
+        "source-map": "^0.5.0"
+      },
+      "dependencies": {
+        "debug": {
+          "version": "4.1.1",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-4.1.1.tgz",
+          "integrity": "sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==",
+          "dev": true,
+          "requires": {
+            "ms": "^2.1.1"
+          }
+        }
+      }
+    },
     "@babel/generator": {
       "version": "7.9.5",
       "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.9.5.tgz",
@@ -25,6 +71,70 @@
         "source-map": "^0.5.0"
       }
     },
+    "@babel/helper-annotate-as-pure": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-annotate-as-pure/-/helper-annotate-as-pure-7.8.3.tgz",
+      "integrity": "sha512-6o+mJrZBxOoEX77Ezv9zwW7WV8DdluouRKNY/IR5u/YTMuKHgugHOzYWlYvYLpLA9nPsQCAAASpCIbjI9Mv+Uw==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.8.3"
+      }
+    },
+    "@babel/helper-builder-binary-assignment-operator-visitor": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-builder-binary-assignment-operator-visitor/-/helper-builder-binary-assignment-operator-visitor-7.8.3.tgz",
+      "integrity": "sha512-5eFOm2SyFPK4Rh3XMMRDjN7lBH0orh3ss0g3rTYZnBQ+r6YPj7lgDyCvPphynHvUrobJmeMignBr6Acw9mAPlw==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-explode-assignable-expression": "^7.8.3",
+        "@babel/types": "^7.8.3"
+      }
+    },
+    "@babel/helper-compilation-targets": {
+      "version": "7.8.7",
+      "resolved": "https://registry.npmjs.org/@babel/helper-compilation-targets/-/helper-compilation-targets-7.8.7.tgz",
+      "integrity": "sha512-4mWm8DCK2LugIS+p1yArqvG1Pf162upsIsjE7cNBjez+NjliQpVhj20obE520nao0o14DaTnFJv+Fw5a0JpoUw==",
+      "dev": true,
+      "requires": {
+        "@babel/compat-data": "^7.8.6",
+        "browserslist": "^4.9.1",
+        "invariant": "^2.2.4",
+        "levenary": "^1.1.1",
+        "semver": "^5.5.0"
+      }
+    },
+    "@babel/helper-create-regexp-features-plugin": {
+      "version": "7.8.8",
+      "resolved": "https://registry.npmjs.org/@babel/helper-create-regexp-features-plugin/-/helper-create-regexp-features-plugin-7.8.8.tgz",
+      "integrity": "sha512-LYVPdwkrQEiX9+1R29Ld/wTrmQu1SSKYnuOk3g0CkcZMA1p0gsNxJFj/3gBdaJ7Cg0Fnek5z0DsMULePP7Lrqg==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-annotate-as-pure": "^7.8.3",
+        "@babel/helper-regex": "^7.8.3",
+        "regexpu-core": "^4.7.0"
+      }
+    },
+    "@babel/helper-define-map": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-define-map/-/helper-define-map-7.8.3.tgz",
+      "integrity": "sha512-PoeBYtxoZGtct3md6xZOCWPcKuMuk3IHhgxsRRNtnNShebf4C8YonTSblsK4tvDbm+eJAw2HAPOfCr+Q/YRG/g==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-function-name": "^7.8.3",
+        "@babel/types": "^7.8.3",
+        "lodash": "^4.17.13"
+      }
+    },
+    "@babel/helper-explode-assignable-expression": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-explode-assignable-expression/-/helper-explode-assignable-expression-7.8.3.tgz",
+      "integrity": "sha512-N+8eW86/Kj147bO9G2uclsg5pwfs/fqqY5rwgIL7eTBklgXjcOJ3btzS5iM6AitJcftnY7pm2lGsrJVYLGjzIw==",
+      "dev": true,
+      "requires": {
+        "@babel/traverse": "^7.8.3",
+        "@babel/types": "^7.8.3"
+      }
+    },
     "@babel/helper-function-name": {
       "version": "7.9.5",
       "resolved": "https://registry.npmjs.org/@babel/helper-function-name/-/helper-function-name-7.9.5.tgz",
@@ -45,6 +155,107 @@
         "@babel/types": "^7.8.3"
       }
     },
+    "@babel/helper-hoist-variables": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-hoist-variables/-/helper-hoist-variables-7.8.3.tgz",
+      "integrity": "sha512-ky1JLOjcDUtSc+xkt0xhYff7Z6ILTAHKmZLHPxAhOP0Nd77O+3nCsd6uSVYur6nJnCI029CrNbYlc0LoPfAPQg==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.8.3"
+      }
+    },
+    "@babel/helper-member-expression-to-functions": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-member-expression-to-functions/-/helper-member-expression-to-functions-7.8.3.tgz",
+      "integrity": "sha512-fO4Egq88utkQFjbPrSHGmGLFqmrshs11d46WI+WZDESt7Wu7wN2G2Iu+NMMZJFDOVRHAMIkB5SNh30NtwCA7RA==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.8.3"
+      }
+    },
+    "@babel/helper-module-imports": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-module-imports/-/helper-module-imports-7.8.3.tgz",
+      "integrity": "sha512-R0Bx3jippsbAEtzkpZ/6FIiuzOURPcMjHp+Z6xPe6DtApDJx+w7UYyOLanZqO8+wKR9G10s/FmHXvxaMd9s6Kg==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.8.3"
+      }
+    },
+    "@babel/helper-module-transforms": {
+      "version": "7.9.0",
+      "resolved": "https://registry.npmjs.org/@babel/helper-module-transforms/-/helper-module-transforms-7.9.0.tgz",
+      "integrity": "sha512-0FvKyu0gpPfIQ8EkxlrAydOWROdHpBmiCiRwLkUiBGhCUPRRbVD2/tm3sFr/c/GWFrQ/ffutGUAnx7V0FzT2wA==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-module-imports": "^7.8.3",
+        "@babel/helper-replace-supers": "^7.8.6",
+        "@babel/helper-simple-access": "^7.8.3",
+        "@babel/helper-split-export-declaration": "^7.8.3",
+        "@babel/template": "^7.8.6",
+        "@babel/types": "^7.9.0",
+        "lodash": "^4.17.13"
+      }
+    },
+    "@babel/helper-optimise-call-expression": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-optimise-call-expression/-/helper-optimise-call-expression-7.8.3.tgz",
+      "integrity": "sha512-Kag20n86cbO2AvHca6EJsvqAd82gc6VMGule4HwebwMlwkpXuVqrNRj6CkCV2sKxgi9MyAUnZVnZ6lJ1/vKhHQ==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.8.3"
+      }
+    },
+    "@babel/helper-plugin-utils": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-plugin-utils/-/helper-plugin-utils-7.8.3.tgz",
+      "integrity": "sha512-j+fq49Xds2smCUNYmEHF9kGNkhbet6yVIBp4e6oeQpH1RUs/Ir06xUKzDjDkGcaaokPiTNs2JBWHjaE4csUkZQ==",
+      "dev": true
+    },
+    "@babel/helper-regex": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-regex/-/helper-regex-7.8.3.tgz",
+      "integrity": "sha512-BWt0QtYv/cg/NecOAZMdcn/waj/5P26DR4mVLXfFtDokSR6fyuG0Pj+e2FqtSME+MqED1khnSMulkmGl8qWiUQ==",
+      "dev": true,
+      "requires": {
+        "lodash": "^4.17.13"
+      }
+    },
+    "@babel/helper-remap-async-to-generator": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-remap-async-to-generator/-/helper-remap-async-to-generator-7.8.3.tgz",
+      "integrity": "sha512-kgwDmw4fCg7AVgS4DukQR/roGp+jP+XluJE5hsRZwxCYGg+Rv9wSGErDWhlI90FODdYfd4xG4AQRiMDjjN0GzA==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-annotate-as-pure": "^7.8.3",
+        "@babel/helper-wrap-function": "^7.8.3",
+        "@babel/template": "^7.8.3",
+        "@babel/traverse": "^7.8.3",
+        "@babel/types": "^7.8.3"
+      }
+    },
+    "@babel/helper-replace-supers": {
+      "version": "7.8.6",
+      "resolved": "https://registry.npmjs.org/@babel/helper-replace-supers/-/helper-replace-supers-7.8.6.tgz",
+      "integrity": "sha512-PeMArdA4Sv/Wf4zXwBKPqVj7n9UF/xg6slNRtZW84FM7JpE1CbG8B612FyM4cxrf4fMAMGO0kR7voy1ForHHFA==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-member-expression-to-functions": "^7.8.3",
+        "@babel/helper-optimise-call-expression": "^7.8.3",
+        "@babel/traverse": "^7.8.6",
+        "@babel/types": "^7.8.6"
+      }
+    },
+    "@babel/helper-simple-access": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-simple-access/-/helper-simple-access-7.8.3.tgz",
+      "integrity": "sha512-VNGUDjx5cCWg4vvCTR8qQ7YJYZ+HBjxOgXEl7ounz+4Sn7+LMD3CFrCTEU6/qXKbA2nKg21CwhhBzO0RpRbdCw==",
+      "dev": true,
+      "requires": {
+        "@babel/template": "^7.8.3",
+        "@babel/types": "^7.8.3"
+      }
+    },
     "@babel/helper-split-export-declaration": {
       "version": "7.8.3",
       "resolved": "https://registry.npmjs.org/@babel/helper-split-export-declaration/-/helper-split-export-declaration-7.8.3.tgz",
@@ -60,6 +271,29 @@
       "integrity": "sha512-/8arLKUFq882w4tWGj9JYzRpAlZgiWUJ+dtteNTDqrRBz9Iguck9Rn3ykuBDoUwh2TO4tSAJlrxDUOXWklJe4g==",
       "dev": true
     },
+    "@babel/helper-wrap-function": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-wrap-function/-/helper-wrap-function-7.8.3.tgz",
+      "integrity": "sha512-LACJrbUET9cQDzb6kG7EeD7+7doC3JNvUgTEQOx2qaO1fKlzE/Bf05qs9w1oXQMmXlPO65lC3Tq9S6gZpTErEQ==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-function-name": "^7.8.3",
+        "@babel/template": "^7.8.3",
+        "@babel/traverse": "^7.8.3",
+        "@babel/types": "^7.8.3"
+      }
+    },
+    "@babel/helpers": {
+      "version": "7.9.2",
+      "resolved": "https://registry.npmjs.org/@babel/helpers/-/helpers-7.9.2.tgz",
+      "integrity": "sha512-JwLvzlXVPjO8eU9c/wF9/zOIN7X6h8DYf7mG4CiFRZRvZNKEF5dQ3H3V+ASkHoIB3mWhatgl5ONhyqHRI6MppA==",
+      "dev": true,
+      "requires": {
+        "@babel/template": "^7.8.3",
+        "@babel/traverse": "^7.9.0",
+        "@babel/types": "^7.9.0"
+      }
+    },
     "@babel/highlight": {
       "version": "7.9.0",
       "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.9.0.tgz",
@@ -77,6 +311,574 @@
       "integrity": "sha512-bC49otXX6N0/VYhgOMh4gnP26E9xnDZK3TmbNpxYzzz9BQLBosQwfyOe9/cXUU3txYhTzLCbcqd5c8y/OmCjHA==",
       "dev": true
     },
+    "@babel/plugin-proposal-async-generator-functions": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-proposal-async-generator-functions/-/plugin-proposal-async-generator-functions-7.8.3.tgz",
+      "integrity": "sha512-NZ9zLv848JsV3hs8ryEh7Uaz/0KsmPLqv0+PdkDJL1cJy0K4kOCFa8zc1E3mp+RHPQcpdfb/6GovEsW4VDrOMw==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-plugin-utils": "^7.8.3",
+        "@babel/helper-remap-async-to-generator": "^7.8.3",
+        "@babel/plugin-syntax-async-generators": "^7.8.0"
+      }
+    },
+    "@babel/plugin-proposal-dynamic-import": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-proposal-dynamic-import/-/plugin-proposal-dynamic-import-7.8.3.tgz",
+      "integrity": "sha512-NyaBbyLFXFLT9FP+zk0kYlUlA8XtCUbehs67F0nnEg7KICgMc2mNkIeu9TYhKzyXMkrapZFwAhXLdnt4IYHy1w==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-plugin-utils": "^7.8.3",
+        "@babel/plugin-syntax-dynamic-import": "^7.8.0"
+      }
+    },
+    "@babel/plugin-proposal-json-strings": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-proposal-json-strings/-/plugin-proposal-json-strings-7.8.3.tgz",
+      "integrity": "sha512-KGhQNZ3TVCQG/MjRbAUwuH+14y9q0tpxs1nWWs3pbSleRdDro9SAMMDyye8HhY1gqZ7/NqIc8SKhya0wRDgP1Q==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-plugin-utils": "^7.8.3",
+        "@babel/plugin-syntax-json-strings": "^7.8.0"
+      }
+    },
+    "@babel/plugin-proposal-nullish-coalescing-operator": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-proposal-nullish-coalescing-operator/-/plugin-proposal-nullish-coalescing-operator-7.8.3.tgz",
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+      "dev": true,
+      "requires": {
+        "@babel/helper-plugin-utils": "^7.8.3",
+        "@babel/plugin-syntax-nullish-coalescing-operator": "^7.8.0"
+      }
+    },
+    "@babel/plugin-proposal-numeric-separator": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-proposal-numeric-separator/-/plugin-proposal-numeric-separator-7.8.3.tgz",
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+      "dev": true,
+      "requires": {
+        "@babel/helper-plugin-utils": "^7.8.3",
+        "@babel/plugin-syntax-numeric-separator": "^7.8.3"
+      }
+    },
+    "@babel/plugin-proposal-object-rest-spread": {
+      "version": "7.9.5",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-proposal-object-rest-spread/-/plugin-proposal-object-rest-spread-7.9.5.tgz",
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+      "dev": true,
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       "resolved": "https://registry.npmjs.org/test-exclude/-/test-exclude-5.2.3.tgz",
@@ -6808,14 +8073,6 @@
       "integrity": "sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==",
       "dev": true
     },
-    "uglify-js": {
-      "version": "3.9.1",
-      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.9.1.tgz",
-      "integrity": "sha512-JUPoL1jHsc9fOjVFHdQIhqEEJsQvfKDjlubcCilu8U26uZ73qOg8VsN8O1jbuei44ZPlwL7kmbAdM4tzaUvqnA==",
-      "requires": {
-        "commander": "~2.20.3"
-      }
-    },
     "umd": {
       "version": "3.0.3",
       "resolved": "https://registry.npmjs.org/umd/-/umd-3.0.3.tgz",
@@ -6835,6 +8092,12 @@
         "xtend": "^4.0.1"
       }
     },
+    "unicode-canonical-property-names-ecmascript": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/unicode-canonical-property-names-ecmascript/-/unicode-canonical-property-names-ecmascript-1.0.4.tgz",
+      "integrity": "sha512-jDrNnXWHd4oHiTZnx/ZG7gtUTVp+gCcTTKr8L0HjlwphROEW3+Him+IpvC+xcJEFegapiMZyZe02CyuOnRmbnQ==",
+      "dev": true
+    },
     "unicode-length": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/unicode-length/-/unicode-length-2.0.2.tgz",
@@ -6868,6 +8131,28 @@
         }
       }
     },
+    "unicode-match-property-ecmascript": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/unicode-match-property-ecmascript/-/unicode-match-property-ecmascript-1.0.4.tgz",
+      "integrity": "sha512-L4Qoh15vTfntsn4P1zqnHulG0LdXgjSO035fEpdtp6YxXhMT51Q6vgM5lYdG/5X3MjS+k/Y9Xw4SFCY9IkR0rg==",
+      "dev": true,
+      "requires": {
+        "unicode-canonical-property-names-ecmascript": "^1.0.4",
+        "unicode-property-aliases-ecmascript": "^1.0.4"
+      }
+    },
+    "unicode-match-property-value-ecmascript": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/unicode-match-property-value-ecmascript/-/unicode-match-property-value-ecmascript-1.2.0.tgz",
+      "integrity": "sha512-wjuQHGQVofmSJv1uVISKLE5zO2rNGzM/KCYZch/QQvez7C1hUhBIuZ701fYXExuufJFMPhv2SyL8CyoIfMLbIQ==",
+      "dev": true
+    },
+    "unicode-property-aliases-ecmascript": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/unicode-property-aliases-ecmascript/-/unicode-property-aliases-ecmascript-1.1.0.tgz",
+      "integrity": "sha512-PqSoPh/pWetQ2phoj5RLiaqIk4kCNwoV3CI+LfGmWLKI3rE3kl1h59XpX2BjgDrmbxD9ARtQobPGU1SguCYuQg==",
+      "dev": true
+    },
     "uniq": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/uniq/-/uniq-1.0.1.tgz",
diff --git a/package.json b/package.json
index e633cec4..e0392ff5 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
     "lint": "standard",
     "pretest": "npm run lint",
     "test": "node --throw-deprecation test.js",
-    "build": "node build.js",
+    "build": "rollup -c",
     "prepublish": "npm run build",
     "browser": "node examples/clientsideserver.js"
   },
@@ -41,16 +41,22 @@
     "dijkstrajs": "^1.0.1",
     "encode-utf8": "^1.0.3",
     "pngjs": "^5.0.0",
-    "uglify-js": "^3.9.1",
     "yargs": "^15.3.1"
   },
   "devDependencies": {
+    "@babel/core": "^7.9.0",
+    "@babel/preset-env": "^7.9.5",
+    "@rollup/plugin-commonjs": "^11.1.0",
+    "@rollup/plugin-node-resolve": "^7.1.3",
     "browserify": "^16.5.1",
     "canvas": "^2.6.1",
     "canvasutil": "0.0.4",
     "colors": "^1.4.0",
     "express": "^4.17.1",
     "htmlparser2": "^4.1.0",
+    "rollup": "^2.6.1",
+    "rollup-plugin-babel": "^4.4.0",
+    "rollup-plugin-terser": "^5.3.0",
     "sinon": "^9.0.2",
     "standard": "^14.3.3",
     "tap": "^14.10.7"
diff --git a/rollup.config.js b/rollup.config.js
new file mode 100644
index 00000000..7a7a443c
--- /dev/null
+++ b/rollup.config.js
@@ -0,0 +1,19 @@
+import babel from 'rollup-plugin-babel'
+import { terser } from 'rollup-plugin-terser'
+import commonjs from '@rollup/plugin-commonjs'
+import resolve from '@rollup/plugin-node-resolve'
+
+const babelConfig = {
+  babelrc: false,
+  presets: [['@babel/preset-env', { targets: 'defaults, IE >= 10, Safari >= 5.1' }]]
+}
+
+export default [{
+  input: 'lib/browser.js',
+  output: { file: 'build/qrcode.js', format: 'iife', name: 'QRCode', exports: 'named' },
+  plugins: [commonjs(), resolve(), babel(babelConfig), terser()]
+}, {
+  input: 'helper/to-sjis-browser.js',
+  output: { file: 'build/qrcode.tosjis.js', format: 'iife', exports: 'none' },
+  plugins: [commonjs(), resolve(), babel(babelConfig), terser()]
+}]