diff --git a/.babelrc b/.babelrc
index 04cac84085..6629c545de 100644
--- a/.babelrc
+++ b/.babelrc
@@ -1,4 +1,5 @@
 {
   "stage": 0,
+  "loose": "all",
   "plugins": [ "object-assign" ]
 }
diff --git a/package.json b/package.json
index 0a5bd27a12..2ff182133c 100644
--- a/package.json
+++ b/package.json
@@ -10,11 +10,13 @@
   "homepage": "https://rackt.github.io/react-router/",
   "bugs": "https://github.com/rackt/react-router/issues",
   "scripts": {
-    "build": "scripts/build.sh",
+    "build": "babel ./modules -d lib --ignore '__tests__'",
+    "build-umd": "NODE_ENV=production webpack modules/index.js lib/umd/History.js",
+    "build-min": "NODE_ENV=production webpack -p modules/index.js lib/umd/History.min.js",
     "build-website": "scripts/build-website.sh",
-    "prepublish": "npm run build",
     "examples": "webpack-dev-server --config examples/webpack.config.js --content-base examples --inline",
-    "test": "eslint modules && karma start"
+    "test": "eslint modules && karma start",
+    "prepublish": "npm run build"
   },
   "authors": [
     "Ryan Florence",
diff --git a/scripts/release.sh b/scripts/release.sh
index e797958360..203037c9ad 100755
--- a/scripts/release.sh
+++ b/scripts/release.sh
@@ -7,15 +7,19 @@ update_version() {
   echo "Updated ${1} version to ${2}"
 }
 
+validate_semver() {
+  if ! [[ $1 =~ ^[0-9]\.[0-9]+\.[0-9](-.+)? ]]; then
+    echo "Version $1 is not valid! It must be a valid semver string like 1.0.2 or 2.3.0-beta.1"
+    exit 1
+  fi
+}
+
 current_version=$(node -p "require('./package').version")
 
 printf "Next version (current is $current_version)? "
 read next_version
 
-if ! [[ $next_version =~ ^[0-9]\.[0-9]+\.[0-9](-.+)? ]]; then
-  echo "Version must be a valid semver string, e.g. 1.0.2 or 2.3.0-beta.1"
-  exit 1
-fi
+validate_semver $next_version
 
 next_ref="v$next_version"
 
@@ -26,8 +30,12 @@ update_version 'package.json' $next_version
 $changelog -t $next_ref
 
 npm run build
-git add -A build
+npm run build-umd
+npm run build-min
 
+echo "gzipped, the UMD build is `gzip -c lib/umd/ReactRouter.min.js | wc -c | sed -e 's/^[[:space:]]*//'` bytes"
+
+git add -A build
 git commit -am "Version $next_version"
 
 git tag $next_ref
@@ -37,8 +45,7 @@ git push origin master
 git push origin $next_ref
 git push origin latest -f
 
-npm publish build
+npm publish
 
 echo "# Publishing docs website"
 ./publish-docs.sh
-