diff --git a/karma.conf.js b/karma.conf.js
index bf634061..d646392e 100644
--- a/karma.conf.js
+++ b/karma.conf.js
@@ -1,3 +1,5 @@
+const webpackConfig = require('./webpack.config');
+
 module.exports = function(config) {
   config.set({
     files: [
@@ -14,9 +16,7 @@ module.exports = function(config) {
     
     browsers: ['Chrome'],
     
-    webpack: {
-      devtool: 'inline-source-map'
-    },
+    webpack: webpackConfig,
     
     webpackServer: {
       noInfo: true
diff --git a/src/index.js b/src/index.js
index 72b8f4d6..668d5f82 100644
--- a/src/index.js
+++ b/src/index.js
@@ -282,5 +282,6 @@ function initialize(env, user, options) {
 }
 
 module.exports = {
-  initialize: initialize
+  initialize: initialize,
+  version: VERSION
 };
diff --git a/webpack.config.js b/webpack.config.js
index 73e770d0..f57a3660 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -1,6 +1,14 @@
+const webpack = require('webpack');
+const package = require('./package.json');
+
 module.exports = {
   output: {
     library: 'LDClient',
     libraryTarget: 'umd'
-  }
+  },
+  plugins: [
+    new webpack.DefinePlugin({
+      VERSION: JSON.stringify(package.version)
+    })
+  ]
 };