diff --git a/packages/rollup-plugin-babel/.eslintrc b/packages/rollup-plugin-babel/.eslintrc
index c1780ab70..53562a6be 100644
--- a/packages/rollup-plugin-babel/.eslintrc
+++ b/packages/rollup-plugin-babel/.eslintrc
@@ -19,6 +19,9 @@
     "extends": "eslint:recommended",
     "parserOptions": {
         "sourceType": "module",
-        "ecmaVersion": 6
+        "ecmaVersion": 2018,
+        "ecmaFeatures": {
+            "spread": true
+        }
     }
 }
diff --git a/packages/rollup-plugin-babel/rollup.config.js b/packages/rollup-plugin-babel/rollup.config.js
index ce4282473..9934641e3 100644
--- a/packages/rollup-plugin-babel/rollup.config.js
+++ b/packages/rollup-plugin-babel/rollup.config.js
@@ -7,7 +7,7 @@ var external = externalDeps.concat(nodeDeps);
 
 export default {
 	input: 'src/index.js',
-	plugins: [ buble() ],
+	plugins: [ buble({ objectAssign: 'Object.assign' }) ],
 	external: external,
 	output: [
 		{
diff --git a/packages/rollup-plugin-babel/src/index.js b/packages/rollup-plugin-babel/src/index.js
index 191f27c46..044a5184f 100644
--- a/packages/rollup-plugin-babel/src/index.js
+++ b/packages/rollup-plugin-babel/src/index.js
@@ -6,27 +6,30 @@ import helperPlugin from './helperPlugin.js';
 import { warnOnce } from './utils.js';
 import { RUNTIME, EXTERNAL, HELPERS } from './constants.js';
 
-export default function babel ( options ) {
-	options = Object.assign( {}, options || {} );
-
-	const filter = createFilter( options.include, options.exclude );
-	delete options.include;
-	delete options.exclude;
-
-	if ( options.sourceMap !== false ) options.sourceMaps = true;
-	if ( options.sourceMaps !== false ) options.sourceMaps = true;
-	delete options.sourceMap;
+const unpackOptions = ({
+	// rollup uses sourcemap, babel uses sourceMaps
+	// just normalize them here so people don't have to worry about it
+	sourcemap = true,
+	sourcemaps = true,
+	sourceMap = true,
+	sourceMaps = true,
+	...rest
+} = {}) => ({
+	sourceMaps: sourcemap && sourcemaps && sourceMap && sourceMaps,
+	...rest
+});
 
-	const runtimeHelpers = options.runtimeHelpers;
-	delete options.runtimeHelpers;
-
-	let externalHelpers;
-	if ( options.externalHelpers ) externalHelpers = true;
-	delete options.externalHelpers;
+export default function babel ( options ) {
+	const {
+		exclude,
+		externalHelpers,
+		externalHelpersWhitelist,
+		include,
+		runtimeHelpers,
+		...babelOptions
+	} = unpackOptions(options);
 
-	let externalHelpersWhitelist = null;
-	if ( options.externalHelpersWhitelist ) externalHelpersWhitelist = options.externalHelpersWhitelist;
-	delete options.externalHelpersWhitelist;
+	const filter = createFilter( include, exclude );
 
 	return {
 		name: 'babel',
@@ -47,7 +50,7 @@ export default function babel ( options ) {
 			if ( !filter( id ) ) return null;
 			if ( id === HELPERS ) return null;
 
-			const helpers = preflightCheck( this, options, dirname( id ) );
+			const helpers = preflightCheck( this, babelOptions, dirname( id ) );
 
 			if ( helpers === EXTERNAL && !externalHelpers ) {
 				warnOnce( this, 'Using "external-helpers" plugin with rollup-plugin-babel is deprecated, as it now automatically deduplicates your Babel helpers.' );
@@ -55,7 +58,7 @@ export default function babel ( options ) {
 				this.error( 'Runtime helpers are not enabled. Either exclude the transform-runtime Babel plugin or pass the `runtimeHelpers: true` option. See https://github.com/rollup/rollup-plugin-babel#configuring-babel for more information' );
 			}
 
-			let localOpts = Object.assign({ filename: id }, options);
+			let localOpts = Object.assign({ filename: id }, babelOptions);
 
 			if ( helpers !== RUNTIME ) {
 				localOpts = Object.assign({}, localOpts, { plugins: (localOpts.plugins || []).concat(helperPlugin) });