diff --git a/src/containers/CanvasAnnotations.js b/src/containers/CanvasAnnotations.js
index b607523b4c476da0604f95a325181dcdf7c6435f..bc2b53b171f53efd55905405a3fa8b4c2531970d 100644
--- a/src/containers/CanvasAnnotations.js
+++ b/src/containers/CanvasAnnotations.js
@@ -1,7 +1,7 @@
 import { compose } from 'redux';
 import { connect } from 'react-redux';
 import { withTranslation } from 'react-i18next';
-import { alpha, withStyles } from '@material-ui/core/styles';
+import { withStyles } from '@material-ui/core/styles';
 import { withPlugins } from '../extend/withPlugins';
 import * as actions from '../state/actions';
 import {