diff --git a/.babelrc b/.babelrc
index 2de1f758..26ca9285 100644
--- a/.babelrc
+++ b/.babelrc
@@ -1,9 +1,34 @@
 {
-  "presets": ["es2015"],
-  "plugins": ["transform-decorators-legacy", "transform-class-properties", "transform-runtime"],
+  "presets": [
+    [
+      "@babel/preset-env", 
+      {
+        "targets": {
+          "node": "8.11",
+          "browsers": [
+            "Firefox 57",
+            "Chrome 60",
+            "iOS 10",
+            "Safari 10"
+          ]
+        }
+      }
+    ]
+  ],
+  "plugins": [
+    [
+      "@babel/plugin-proposal-decorators",
+      {
+        "legacy": true
+      }
+    ],
+    "@babel/plugin-proposal-class-properties" 
+  ],
   "env": {
     "cover": {
-      "plugins": ["istanbul"]
+      "plugins": [
+        "istanbul"
+      ]
     }
   }
 }
diff --git a/package-lock.json b/package-lock.json
index 5c54388b..d3930798 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,225 +4,65 @@
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@@ -233,81 +73,61 @@
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+          "dev": true,
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       "dev": true
     },
     "to-object-path": {
@@ -8627,6 +7653,18 @@
       "optional": true,
       "requires": {
         "kind-of": "^3.0.2"
+      },
+      "dependencies": {
+        "kind-of": {
+          "version": "3.2.2",
+          "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-3.2.2.tgz",
+          "integrity": "sha1-MeohpzS6ubuw8yRm2JOupR5KPGQ=",
+          "dev": true,
+          "optional": true,
+          "requires": {
+            "is-buffer": "^1.1.5"
+          }
+        }
       }
     },
     "to-regex": {
@@ -8661,16 +7699,22 @@
           "optional": true,
           "requires": {
             "kind-of": "^3.0.2"
+          },
+          "dependencies": {
+            "kind-of": {
+              "version": "3.2.2",
+              "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-3.2.2.tgz",
+              "integrity": "sha1-MeohpzS6ubuw8yRm2JOupR5KPGQ=",
+              "dev": true,
+              "optional": true,
+              "requires": {
+                "is-buffer": "^1.1.5"
+              }
+            }
           }
         }
       }
     },
-    "trim-right": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/trim-right/-/trim-right-1.0.1.tgz",
-      "integrity": "sha1-yy4SAwZ+DI3h9hQJS5/kVwTqYAM=",
-      "dev": true
-    },
     "type": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/type/-/type-1.0.1.tgz",
@@ -8689,6 +7733,28 @@
       "resolved": "https://registry.npmjs.org/typedarray/-/typedarray-0.0.6.tgz",
       "integrity": "sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c="
     },
+    "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-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": "1.1.0",
+      "resolved": "https://registry.npmjs.org/unicode-match-property-value-ecmascript/-/unicode-match-property-value-ecmascript-1.1.0.tgz",
+      "integrity": "sha512-hDTHvaBk3RmFzvSl0UVrUmC3PuW9wKVnpoUDYH0JDkSIovzw+J5viQmeYHxVSBptubnr7PbH2e0fnpDRQnQl5g==",
+      "dev": true
+    },
     "unicode-properties": {
       "version": "1.2.2",
       "resolved": "https://registry.npmjs.org/unicode-properties/-/unicode-properties-1.2.2.tgz",
@@ -8714,6 +7780,12 @@
         }
       }
     },
+    "unicode-property-aliases-ecmascript": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/unicode-property-aliases-ecmascript/-/unicode-property-aliases-ecmascript-1.0.5.tgz",
+      "integrity": "sha512-L5RAqCfXqAwR3RriF8pM0lU0w4Ryf/GgzONwi6KnL1taJQa7x1TCxdJnILX59WIGOwR57IVxn7Nej0fz1Ny6fw==",
+      "dev": true
+    },
     "unicode-trie": {
       "version": "0.3.1",
       "resolved": "https://registry.npmjs.org/unicode-trie/-/unicode-trie-0.3.1.tgz",
@@ -8787,6 +7859,13 @@
         }
       }
     },
+    "upath": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/upath/-/upath-1.2.0.tgz",
+      "integrity": "sha512-aZwGpamFO61g3OlfT7OQCHqhGnW43ieH9WZeP7QxN/G/jS4jfqUkZxoryvJgVPEcrl5NL/ggHsSmLMHuH64Lhg==",
+      "dev": true,
+      "optional": true
+    },
     "urix": {
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/urix/-/urix-0.1.0.tgz",
@@ -8801,26 +7880,11 @@
       "dev": true,
       "optional": true
     },
-    "user-home": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/user-home/-/user-home-1.1.1.tgz",
-      "integrity": "sha1-K1viOjK2Onyd640PKNSFcko98ZA=",
-      "dev": true
-    },
     "util-deprecate": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
       "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
     },
-    "v8flags": {
-      "version": "2.1.1",
-      "resolved": "https://registry.npmjs.org/v8flags/-/v8flags-2.1.1.tgz",
-      "integrity": "sha1-qrGh+jDUX4jdMhFIh1rALAtV5bQ=",
-      "dev": true,
-      "requires": {
-        "user-home": "^1.1.1"
-      }
-    },
     "validate-npm-package-license": {
       "version": "3.0.4",
       "resolved": "https://registry.npmjs.org/validate-npm-package-license/-/validate-npm-package-license-3.0.4.tgz",
diff --git a/package.json b/package.json
index 0581a492..4f9710c3 100644
--- a/package.json
+++ b/package.json
@@ -13,13 +13,12 @@
   ],
   "scripts": {
     "test": "mocha",
-    "prepublish": "run-s clean trie:** rollup:**",
+    "prepublish": "run-s clean trie:** rollup",
     "trie:data": "babel-node src/opentype/shapers/generate-data.js",
     "trie:use": "babel-node src/opentype/shapers/gen-use.js",
     "trie:indic": "babel-node src/opentype/shapers/gen-indic.js",
     "trie:copy": "shx cp src/opentype/shapers/*.trie ./",
-    "rollup:index": "rollup -c -m -i src/index.js -o index.js",
-    "rollup:base": "rollup -c -m -i src/base.js -o base.js",
+    "rollup": "rollup -c",
     "clean": "shx rm -f index.js base.js data.trie indic.trie use.trie src/opentype/shapers/data.trie src/opentype/shapers/use.trie src/opentype/shapers/use.json src/opentype/shapers/indic.trie src/opentype/shapers/indic.json",
     "coverage": "cross-env BABEL_ENV=cover nyc mocha"
   },
@@ -31,6 +30,10 @@
     "base.js.map",
     "index.js",
     "index.js.map",
+    "base.es5.js",
+    "base.es5.js.map",
+    "index.es5.js",
+    "index.es5.js.map",
     "data.trie",
     "use.trie",
     "indic.trie"
@@ -42,7 +45,6 @@
     "url": "git://github.com/foliojs/fontkit.git"
   },
   "dependencies": {
-    "babel-runtime": "^6.26.0",
     "brfs": "^2.0.0",
     "brotli": "^1.2.0",
     "browserify-optional": "^1.0.1",
@@ -55,13 +57,14 @@
     "unicode-trie": "^0.3.0"
   },
   "devDependencies": {
-    "babel-cli": "^6.26.0",
-    "babel-plugin-istanbul": "^4.1.6",
-    "babel-plugin-transform-class-properties": "^6.16.0",
-    "babel-plugin-transform-decorators-legacy": "^1.3.5",
-    "babel-plugin-transform-runtime": "^6.12.0",
-    "babel-preset-es2015": "^6.14.0",
-    "babel-register": "^6.26.0",
+    "@babel/cli": "^7.0.0",
+    "@babel/core": "^7.0.0",
+    "@babel/node": "^7.0.0",
+    "@babel/plugin-proposal-class-properties": "^7.0.0",
+    "@babel/plugin-proposal-decorators": "^7.0.0",
+    "@babel/preset-env": "^7.0.0",
+    "@babel/register": "^7.0.0",
+    "babel-plugin-istanbul": "^5.1.1",
     "codepoints": "^1.2.0",
     "concat-stream": "^1.6.2",
     "cross-env": "^5.0.1",
@@ -71,9 +74,9 @@
     "mocha": "^2.0.1",
     "npm-run-all": "^4.0.2",
     "nyc": "^10.3.2",
-    "rollup": "^0.34.10",
-    "rollup-plugin-babel": "^2.6.1",
-    "rollup-plugin-json": "^2.3.1",
+    "rollup": "^1.5.0",
+    "rollup-plugin-babel": "^4.0.1",
+    "rollup-plugin-json": "^3.1.0",
     "rollup-plugin-local-resolve": "^1.0.7",
     "shx": "^0.2.2"
   },
diff --git a/rollup.config.js b/rollup.config.js
index ea728975..9ca31643 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -2,16 +2,68 @@ import babel from 'rollup-plugin-babel';
 import localResolve from 'rollup-plugin-local-resolve';
 import json from 'rollup-plugin-json';
 
-export default {
-  format: 'cjs',
-  plugins: [
-    localResolve(),
-    json(),
-    babel({
-      babelrc: false,
-      presets: [['es2015', { modules: false, loose: true }]],
-      plugins: ['transform-decorators-legacy', 'transform-class-properties', 'transform-runtime'],
-      runtimeHelpers: true
-    })
-  ]
-};
+function createConfig(filename, browserlist, suffix = '') {
+  return {
+    input: `src/${filename}`,
+    output: {
+      file: `${filename}${suffix}.js`,
+      format: 'cjs',
+      sourcemap: true
+    },
+    external: [
+      'restructure',
+      'tiny-inflate',
+      'brotli/decompress',
+      'unicode-properties',
+      'clone',
+      'deep-equal',
+      'unicode-trie',
+      'dfa',
+      'restructure/src/utils'
+    ],
+    plugins: [
+      localResolve(),
+      json(),
+      babel({
+        presets: [
+          [
+            '@babel/preset-env', 
+            {
+              modules: false,
+              targets: {
+                browsers: browserlist
+              }
+            }
+          ]
+        ],
+        plugins: [
+          [
+            '@babel/plugin-proposal-decorators',
+            {
+              legacy: true
+            }
+          ],
+          '@babel/plugin-proposal-class-properties'
+        ]
+      })
+    ]
+  }
+}
+
+const modernBrowsers = [
+  'Firefox 57',
+  'Chrome 60',
+  'iOS 10',
+  'Safari 10'
+];
+
+const legacyBrowsers = [
+  'ie 11'
+];
+
+export default [
+  createConfig('base', modernBrowsers),
+  createConfig('index', modernBrowsers),
+  createConfig('base', legacyBrowsers, '.es5'),
+  createConfig('index', legacyBrowsers, '.es5')
+];
diff --git a/test/mocha.opts b/test/mocha.opts
index fd3ae628..50b78449 100644
--- a/test/mocha.opts
+++ b/test/mocha.opts
@@ -1,2 +1,2 @@
 --reporter spec
---compilers js:babel-register
+--compilers js:@babel/register