diff --git a/gulpfile.js b/gulpfile.js
index 322195fa96..5ddc4da5b9 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -76,13 +76,28 @@ var buildDist = function(opts) {
   var webpackOpts = {
     debug: opts.debug,
     externals: {
-      immutable: 'Immutable',
-      react: 'React',
-      'react-dom': 'ReactDOM',
+      immutable: {
+        root: 'Immutable',
+        commonjs2: 'immutable',
+        commonjs: 'immutable',
+        amd: 'immutable',
+      },
+      react: {
+        root: 'React',
+        commonjs2: 'react',
+        commonjs: 'react',
+        amd: 'react',
+      },
+      'react-dom': {
+        root: 'ReactDOM',
+        commonjs2: 'react-dom',
+        commonjs: 'react-dom',
+        amd: 'react-dom',
+      },
     },
     output: {
       filename: opts.output,
-      libraryTarget: 'var',
+      libraryTarget: 'umd',
       library: 'Draft',
     },
     plugins: [