diff --git a/package.json b/package.json
index 6e4d0aab..1c5e22cf 100644
--- a/package.json
+++ b/package.json
@@ -4,10 +4,11 @@
   "version": "5.0.5",
   "scripts": {
     "clean": "shx rm -rf lib lib-esm _bundles",
-    "build": "npm run clean && tsc && tsc -m es6 --outDir lib-esm && npm run fixdts && npm run bundle",
+    "build": "npm run clean && tsc && tsc -m es6 --outDir lib-esm && npm run fixdts && npm run bundle && npm run fixmaps",
     "bundle": "rollup -c && rollup -c --environment MINIFY",
     "fixdts": "dts-downlevel 'lib/**/*.d.ts' 'lib-esm/**/*.d.ts'",
-    "install": "node ./migrate/migratewarn.js",
+    "fixmaps": "node scripts/modify_sourcemap_paths.js",
+    "install": "node migrate/migratewarn.js",
     "prepare": "npm run build",
     "test": "karma start",
     "watch": "run-p watch:*",
@@ -55,8 +56,8 @@
   "engines": {
     "node": ">=4.0.0"
   },
+  "main": "_bundles/ui-router-core.js",
   "jsnext:main": "lib-esm/index.js",
-  "main": "lib/index.js",
   "typings": "lib/index.d.ts",
   "license": "MIT",
   "devDependencies": {
@@ -68,6 +69,7 @@
     "conventional-changelog-ui-router-core": "^1.4.1",
     "core-js": "^2.4.1",
     "dts-downlevel": "^0.3.0",
+    "glob": "^7.1.2",
     "jasmine-core": "^2.4.1",
     "karma": "^1.2.0",
     "karma-chrome-launcher": "~0.1.0",
diff --git a/scripts/artifacts.json b/scripts/artifacts.json
new file mode 100644
index 00000000..363bb1a5
--- /dev/null
+++ b/scripts/artifacts.json
@@ -0,0 +1,8 @@
+{
+  "ARTIFACTS": [
+    "lib",
+    "lib-esm",
+    "_bundles",
+    "package.json"
+  ]
+}
diff --git a/scripts/modify_sourcemap_paths.js b/scripts/modify_sourcemap_paths.js
new file mode 100644
index 00000000..dba78c4b
--- /dev/null
+++ b/scripts/modify_sourcemap_paths.js
@@ -0,0 +1,27 @@
+#!env node
+"use strict";
+
+require('shelljs/global');
+const fs = require('fs');
+const path = require('path');
+const glob = require('glob');
+const pkgName = require('../package.json').name;
+const prefix = path.resolve(__dirname, '..');
+
+const allartifacts = require('./artifacts.json').ARTIFACTS;
+const globs = allartifacts
+    .map(dir => path.resolve(prefix, dir))
+    .filter(dir => fs.lstatSync(dir).isDirectory())
+    .map(dir => `${dir}/**/*.js.map`);
+
+const files = globs
+    .map(pattern => glob.sync(pattern))
+    .reduce((acc, arr) => acc.concat(arr), []);
+
+files.forEach(file => {
+  const data = JSON.parse(fs.readFileSync(file));
+  if (Array.isArray(data.sources)) {
+    data.sources = data.sources.map(source => source.replace(/^(?:\.\.\/)*src/, pkgName));
+    fs.writeFileSync(file, JSON.stringify(data));
+  }
+});
diff --git a/tsconfig.esm.json b/tsconfig.esm.json
index c6f0f26a..d0368a07 100644
--- a/tsconfig.esm.json
+++ b/tsconfig.esm.json
@@ -10,7 +10,8 @@
     "rootDir": "src",
     "outDir": "lib-esm",
     "declaration": true,
-    "sourceMap": true
+    "sourceMap": true,
+    "inlineSources": true
   },
   "files": [
     "src/index.ts", "src/vanilla.ts"
diff --git a/tsconfig.json b/tsconfig.json
index 55d96a4a..173c1dbf 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -10,7 +10,8 @@
     "rootDir": "src",
     "outDir": "lib",
     "declaration": true,
-    "sourceMap": true
+    "sourceMap": true,
+    "inlineSources": true
   },
   "files": [
     "src/index.ts", "src/vanilla.ts"