diff --git a/babel.config.js b/babel.config.js
index e6121487..be17c3e7 100755
--- a/babel.config.js
+++ b/babel.config.js
@@ -1,3 +1,9 @@
 module.exports = {
-  presets: ['@babel/preset-env', '@babel/preset-react'],
+  presets: [
+    '@babel/preset-env',
+    '@babel/preset-react',
+  ],
+  plugins: [
+    '@babel/plugin-proposal-class-properties',
+  ],
 };
\ No newline at end of file
diff --git a/package.json b/package.json
old mode 100755
new mode 100644
index 92ffd702..04c3f772
--- a/package.json
+++ b/package.json
@@ -17,6 +17,7 @@
     "react-router": "^5"
   },
   "devDependencies": {
+    "@babel/plugin-proposal-class-properties": "^7.8.3",
     "@babel/preset-env": "^7.7.1",
     "@babel/preset-react": "^7.7.0",
     "babel-core": "^6",
diff --git a/src/js/services/mopidy/middleware.js b/src/js/services/mopidy/middleware.js
index 685e4391..55749476 100755
--- a/src/js/services/mopidy/middleware.js
+++ b/src/js/services/mopidy/middleware.js
@@ -852,15 +852,15 @@ const MopidyMiddleware = (function () {
 
       case 'MOPIDY_PLAY_URIS':
         const { from_uri } = action;
-        let uris = Object.assign([], action.uris);
+        let urisToPlay = Object.assign([], action.uris);
 
-        if (!uris || !uris.length) {
+        if (!urisToPlay || !urisToPlay.length) {
           this.props.uiActions.createNotification({ content: 'No URIs to play', type: 'warning' });
           break;
         }
 
         if (action.shuffle) {
-          action.uris = helpers.shuffle(action.uris);
+          urisToPlay = helpers.shuffle(urisToPlay);
         }
 
         // Stop the radio
@@ -875,7 +875,7 @@ const MopidyMiddleware = (function () {
 
         // Shuffle/random mode
         if (store.getState().mopidy.random) {
-          var first_uri_index = Math.floor(Math.random() * action.uris.length);
+          var first_uri_index = Math.floor(Math.random() * urisToPlay.length);
         } else {
           var first_uri_index = 0;
         }