diff --git a/js/actionTypes.js b/js/actionTypes.js
index bbfd952f..d0d87615 100644
--- a/js/actionTypes.js
+++ b/js/actionTypes.js
@@ -1,5 +1,9 @@
 export const CLOSE_CONTEXT_MENU = 'CLOSE_CONTEXT_MENU';
 export const CLOSE_WINAMP = 'CLOSE_WINAMP';
+export const IS_PLAYING = 'IS_PLAYING';
+export const IS_STOPPED = 'IS_STOPPED';
+export const PAUSE = 'PAUSE';
+export const PLAY = 'PLAY';
 export const SET_BALANCE = 'SET_BALANCE';
 export const SET_BAND_VALUE = 'SET_BAND_VALUE';
 export const SET_FOCUS = 'SET_FOCUS';
@@ -11,6 +15,7 @@ export const SET_VOLUME = 'SET_VOLUME';
 export const START_LOADING = 'START_LOADING';
 export const START_WORKING = 'START_WORKING';
 export const STEP_MARQUEE = 'STEP_MARQUEE';
+export const STOP = 'STOP';
 export const STOP_WORKING = 'STOP_WORKING';
 export const TOGGLE_CONTEXT_MENU = 'TOGGLE_CONTEXT_MENU';
 export const TOGGLE_DOUBLESIZE_MODE = 'TOGGLE_DOUBLESIZE_MODE';
diff --git a/js/mediaMiddleware.js b/js/mediaMiddleware.js
index e6182563..b40ce7d5 100644
--- a/js/mediaMiddleware.js
+++ b/js/mediaMiddleware.js
@@ -1,40 +1,53 @@
+import {
+  IS_PLAYING,
+  IS_STOPPED,
+  PAUSE,
+  PLAY,
+  SET_BALANCE,
+  SET_VOLUME,
+  START_WORKING,
+  STOP,
+  STOP_WORKING,
+  UPDATE_TIME_ELAPSED
+} from './actionTypes';
+
 export default (media) => (
   (store) => {
     media.addEventListener('timeupdate', () => {
-      store.dispatch({type: 'UPDATE_TIME_ELAPSED', elapsed: media.timeElapsed()});
+      store.dispatch({type: UPDATE_TIME_ELAPSED, elapsed: media.timeElapsed()});
     });
 
     media.addEventListener('ended', () => {
-      store.dispatch({type: 'IS_STOPPED'});
+      store.dispatch({type: IS_STOPPED});
     });
 
     media.addEventListener('playing', () => {
-      store.dispatch({type: 'IS_PLAYING'});
+      store.dispatch({type: IS_PLAYING});
     });
 
     media.addEventListener('waiting', () => {
-      store.dispatch({type: 'START_WORKING'});
+      store.dispatch({type: START_WORKING});
     });
 
     media.addEventListener('stopWaiting', () => {
-      store.dispatch({type: 'STOP_WORKING'});
+      store.dispatch({type: STOP_WORKING});
     });
 
     return (next) => (action) => {
       switch (action.type) {
-        case 'PLAY':
+        case PLAY:
           media.play();
           break;
-        case 'PAUSE':
+        case PAUSE:
           media.pause();
           break;
-        case 'STOP':
+        case STOP:
           media.stop();
           break;
-        case 'SET_VOLUME':
+        case SET_VOLUME:
           media.setVolume(action.volume);
           break;
-        case 'SET_BALANCE':
+        case SET_BALANCE:
           media.setBalance(action.balance);
           break;
       }