diff --git a/superset/assets/src/addSlice/AddSliceContainer.jsx b/superset/assets/src/addSlice/AddSliceContainer.jsx
index 3ab0706c9932f..71dda49c28ca2 100644
--- a/superset/assets/src/addSlice/AddSliceContainer.jsx
+++ b/superset/assets/src/addSlice/AddSliceContainer.jsx
@@ -31,7 +31,7 @@ const propTypes = {
   })).isRequired,
 };
 
-const styleSelectWidth = { width: 300 };
+const styleSelectWidth = { width: 600 };
 
 export default class AddSliceContainer extends React.PureComponent {
   constructor(props) {
@@ -83,18 +83,19 @@ export default class AddSliceContainer extends React.PureComponent {
             <div style={styleSelectWidth}>
               <Select
                 clearable={false}
-                style={styleSelectWidth}
+                ignoreAccents={false}
                 name="select-datasource"
                 onChange={this.changeDatasource}
                 options={this.props.datasources}
                 placeholder={t('Choose a datasource')}
+                style={styleSelectWidth}
                 value={this.state.datasourceValue}
-                width={200}
+                width={600}
               />
             </div>
             <p className="text-muted">
               {t(
-                'If the datasource your are looking for is not ' +
+                'If the datasource you are looking for is not ' +
                 'available in the list, ' +
                 'follow the instructions on the how to add it on the ')}
               <a href="https://superset.apache.org/tutorial.html">{t('Superset tutorial')}</a>