diff --git a/packages/netlify-cms-proxy-server/webpack.config.js b/packages/netlify-cms-proxy-server/webpack.config.js
index b93dc9e0332a..28914a49f857 100644
--- a/packages/netlify-cms-proxy-server/webpack.config.js
+++ b/packages/netlify-cms-proxy-server/webpack.config.js
@@ -10,7 +10,7 @@ module.exports = {
   entry: { index: path.join('src', 'index.ts'), middlewares: path.join('src', 'middlewares.ts') },
   mode: NODE_ENV,
   target: 'node',
-  devtool: 'cheap-module-source-map',
+  devtool: 'source-map',
   output: {
     path: path.resolve(__dirname, 'dist'),
     filename: '[name].js',
diff --git a/packages/netlify-cms-widget-map/src/withMapControl.js b/packages/netlify-cms-widget-map/src/withMapControl.js
index d21e01c86ad8..560664e6b2f9 100644
--- a/packages/netlify-cms-widget-map/src/withMapControl.js
+++ b/packages/netlify-cms-widget-map/src/withMapControl.js
@@ -33,11 +33,13 @@ export default function withMapControl({ getFormat, getMap } = {}) {
     static propTypes = {
       onChange: PropTypes.func.isRequired,
       field: PropTypes.object.isRequired,
+      height: PropTypes.string,
       value: PropTypes.node,
     };
 
     static defaultProps = {
       value: '',
+      height: '400px'
     };
 
     constructor(props) {
@@ -70,6 +72,8 @@ export default function withMapControl({ getFormat, getMap } = {}) {
     }
 
     render() {
+      const { height } = this.props;
+
       return (
         <ClassNames>
           {({ cx, css }) => (
@@ -80,6 +84,7 @@ export default function withMapControl({ getFormat, getMap } = {}) {
                   ${olStyles};
                   padding: 0;
                   overflow: hidden;
+                  height: ${height};
                 `,
               )}
               ref={this.mapContainer}