diff --git a/.gitignore b/.gitignore
index cc290b3..31289d6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -59,6 +59,7 @@ build/Release
 # Dependency directories
 node_modules
 jspm_packages
+package-lock.json
 
 # Optional npm cache directory
 .npm
diff --git a/karma.conf.js b/karma.conf.js
index bd8bdea..75eae96 100644
--- a/karma.conf.js
+++ b/karma.conf.js
@@ -19,6 +19,18 @@ module.exports = function (config) {
       'karma-firefox-launcher',
       'karma-detect-browsers'
     ],
+    browserify: {
+      'transform': [
+        [
+          'babelify',
+          {
+            'presets': [
+              'env'
+            ]
+          }
+        ]
+      ]
+    },
     detectBrowsers: {
       enabled: true,
       usePhantomJS: false,
diff --git a/package.json b/package.json
index 06598e4..8c6fab0 100644
--- a/package.json
+++ b/package.json
@@ -12,18 +12,6 @@
     "test:node": "node tests/index.js",
     "build:docs": "documentation build ./index.js --format md --shallow > ./docs/index.md && documentation build ./from-rpc.js --format md --shallow  > ./docs/fromRpc.md"
   },
-  "browserify": {
-    "transform": [
-      [
-        "babelify",
-        {
-          "presets": [
-            "es2015"
-          ]
-        }
-      ]
-    ]
-  },
   "repository": {
     "type": "git",
     "url": "git+https://github.com/ethereumjs/ethereumjs-block.git"
@@ -46,20 +34,20 @@
     "merkle-patricia-tree": "^2.1.2"
   },
   "devDependencies": {
-    "babel-preset-es2015": "^6.24.0",
-    "babelify": "^7.3.0",
-    "browserify": "^13.0.0",
+    "babelify": "^8.0.0",
+    "babel-preset-env": "^1.6.1",
+    "browserify": "^15.0.0",
     "coveralls": "^2.11.6",
     "documentation": "4.0.0-beta16",
     "ethereumjs-testing": "~1.0.0",
     "istanbul": "^0.4.2",
-    "karma": "^1.3.0",
+    "karma": "^2.0.0",
     "karma-browserify": "^5.1.0",
-    "karma-chrome-launcher": "^2.0.0",
-    "karma-detect-browsers": "^2.2.1",
+    "karma-chrome-launcher": "^2.2.0",
+    "karma-detect-browsers": "^2.2.5",
     "karma-env-preprocessor": "^0.1.1",
-    "karma-firefox-launcher": "^1.0.0",
-    "karma-tap": "^3.1.0",
+    "karma-firefox-launcher": "^1.1.0",
+    "karma-tap": "^4.0.0",
     "standard": "^8.4.0",
     "tape": "^4.2.0"
   }