diff --git a/js/main.js b/js/main.js
index cf2e619..217a860 100644
--- a/js/main.js
+++ b/js/main.js
@@ -19,6 +19,8 @@ import Inserter from './inserter';
 import Settings from './settings';
 import ControlBuilder from './controlbuilder';
 
+require('string.prototype.repeat');
+
 class PainterroProc {
   constructor(params) {
     addDocumentObjectHelpers();
diff --git a/package-lock.json b/package-lock.json
index 7cabf08..e60d911 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -643,6 +643,17 @@
         "trim-right": "^1.0.1"
       }
     },
+    "babel-helper-builder-binary-assignment-operator-visitor": {
+      "version": "6.24.1",
+      "resolved": "https://registry.npmjs.org/babel-helper-builder-binary-assignment-operator-visitor/-/babel-helper-builder-binary-assignment-operator-visitor-6.24.1.tgz",
+      "integrity": "sha1-zORReto1b0IgvK6KAsKzRvmlZmQ=",
+      "dev": true,
+      "requires": {
+        "babel-helper-explode-assignable-expression": "^6.24.1",
+        "babel-runtime": "^6.22.0",
+        "babel-types": "^6.24.1"
+      }
+    },
     "babel-helper-call-delegate": {
       "version": "6.24.1",
       "resolved": "https://registry.npmjs.org/babel-helper-call-delegate/-/babel-helper-call-delegate-6.24.1.tgz",
@@ -667,6 +678,17 @@
         "lodash": "^4.17.4"
       }
     },
+    "babel-helper-explode-assignable-expression": {
+      "version": "6.24.1",
+      "resolved": "https://registry.npmjs.org/babel-helper-explode-assignable-expression/-/babel-helper-explode-assignable-expression-6.24.1.tgz",
+      "integrity": "sha1-8luCz33BBDPFX3BZLVdGQArCLKo=",
+      "dev": true,
+      "requires": {
+        "babel-runtime": "^6.22.0",
+        "babel-traverse": "^6.24.1",
+        "babel-types": "^6.24.1"
+      }
+    },
     "babel-helper-function-name": {
       "version": "6.24.1",
       "resolved": "https://registry.npmjs.org/babel-helper-function-name/-/babel-helper-function-name-6.24.1.tgz",
@@ -774,6 +796,12 @@
         "babel-runtime": "^6.22.0"
       }
     },
+    "babel-plugin-syntax-exponentiation-operator": {
+      "version": "6.13.0",
+      "resolved": "https://registry.npmjs.org/babel-plugin-syntax-exponentiation-operator/-/babel-plugin-syntax-exponentiation-operator-6.13.0.tgz",
+      "integrity": "sha1-nufoM3KQ2pUoggGmpX9BcDF4MN4=",
+      "dev": true
+    },
     "babel-plugin-transform-es2015-arrow-functions": {
       "version": "6.22.0",
       "resolved": "https://registry.npmjs.org/babel-plugin-transform-es2015-arrow-functions/-/babel-plugin-transform-es2015-arrow-functions-6.22.0.tgz",
@@ -1008,6 +1036,17 @@
         "regexpu-core": "^2.0.0"
       }
     },
+    "babel-plugin-transform-exponentiation-operator": {
+      "version": "6.24.1",
+      "resolved": "https://registry.npmjs.org/babel-plugin-transform-exponentiation-operator/-/babel-plugin-transform-exponentiation-operator-6.24.1.tgz",
+      "integrity": "sha1-KrDJx/MJj6SJB3cruBP+QejeOg4=",
+      "dev": true,
+      "requires": {
+        "babel-helper-builder-binary-assignment-operator-visitor": "^6.24.1",
+        "babel-plugin-syntax-exponentiation-operator": "^6.8.0",
+        "babel-runtime": "^6.22.0"
+      }
+    },
     "babel-plugin-transform-regenerator": {
       "version": "6.26.0",
       "resolved": "https://registry.npmjs.org/babel-plugin-transform-regenerator/-/babel-plugin-transform-regenerator-6.26.0.tgz",
@@ -1027,6 +1066,25 @@
         "babel-types": "^6.24.1"
       }
     },
+    "babel-polyfill": {
+      "version": "6.26.0",
+      "resolved": "https://registry.npmjs.org/babel-polyfill/-/babel-polyfill-6.26.0.tgz",
+      "integrity": "sha1-N5k3q8Z9eJWXCtxiHyhM2WbPIVM=",
+      "dev": true,
+      "requires": {
+        "babel-runtime": "^6.26.0",
+        "core-js": "^2.5.0",
+        "regenerator-runtime": "^0.10.5"
+      },
+      "dependencies": {
+        "regenerator-runtime": {
+          "version": "0.10.5",
+          "resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.10.5.tgz",
+          "integrity": "sha1-M2w+/BIgrc7dosn6tntaeVWjNlg=",
+          "dev": true
+        }
+      }
+    },
     "babel-preset-es2015": {
       "version": "6.24.1",
       "resolved": "https://registry.npmjs.org/babel-preset-es2015/-/babel-preset-es2015-6.24.1.tgz",
@@ -1059,6 +1117,15 @@
         "babel-plugin-transform-regenerator": "^6.24.1"
       }
     },
+    "babel-preset-es2016": {
+      "version": "6.24.1",
+      "resolved": "https://registry.npmjs.org/babel-preset-es2016/-/babel-preset-es2016-6.24.1.tgz",
+      "integrity": "sha1-+QC/k+LrwNJ235uKtZck6/2Vn4s=",
+      "dev": true,
+      "requires": {
+        "babel-plugin-transform-exponentiation-operator": "^6.24.1"
+      }
+    },
     "babel-register": {
       "version": "6.26.0",
       "resolved": "https://registry.npmjs.org/babel-register/-/babel-register-6.26.0.tgz",
@@ -8034,6 +8101,12 @@
       "integrity": "sha512-2cBVCj6I4IOvEnjgO/hWqXjqBGsY+zwPmHl12Srk9IXSZ56Jwwmy+66XO5Iut/oQVR7t5ihYdLB0GMa4alEUcg==",
       "dev": true
     },
+    "string.prototype.repeat": {
+      "version": "0.2.0",
+      "resolved": "https://registry.npmjs.org/string.prototype.repeat/-/string.prototype.repeat-0.2.0.tgz",
+      "integrity": "sha1-q6Nt4I3O5qWjN9SbLqHaGyj8Ds8=",
+      "dev": true
+    },
     "string_decoder": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
diff --git a/package.json b/package.json
index 0d391ec..78f7743 100644
--- a/package.json
+++ b/package.json
@@ -24,6 +24,7 @@
     "babel-core": "^6.24.1",
     "babel-loader": "^7.0.0",
     "babel-preset-es2015": "^6.24.1",
+    "babel-preset-es2016": "^6.24.1",
     "css-loader": "^0.28.3",
     "es6-promise": "^4.1.1",
     "eslint": "^4.1.1",
@@ -37,6 +38,7 @@
     "lodash": ">=4.17.13",
     "mime": ">=1.4.1",
     "raw-loader": "^0.5.1",
+    "string.prototype.repeat": "^0.2.0",
     "style-loader": "^0.18.1",
     "url-loader": "^0.5.8",
     "webfonts-generator": "^0.4.0",
diff --git a/webpack.config.js b/webpack.config.js
index 0625eec..eefcd7d 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -34,7 +34,7 @@ function webpackConfig(target) {
           test: /\.js$/,
           loader: 'babel-loader',
           query: {
-            presets: ['es2015']
+            presets: ['es2015', 'es2016']
           }
         },
         {