diff --git a/src/background/components/background.js b/src/background/components/background.js
index 266ad64..a5f4f5f 100644
--- a/src/background/components/background.js
+++ b/src/background/components/background.js
@@ -7,7 +7,6 @@ import * as commands from 'shared/commands';
 export default class BackgroundComponent {
   constructor(store) {
     this.store = store;
-    this.setting = {};
 
     browser.runtime.onMessage.addListener((message, sender) => {
       try {
@@ -21,11 +20,8 @@ export default class BackgroundComponent {
     });
   }
 
-  update() {
-    this.settings = this.store.getState();
-  }
-
   onMessage(message, sender) {
+    let settings = this.store.getState().setting;
     switch (message.type) {
     case messages.BACKGROUND_OPERATION:
       return this.store.dispatch(
@@ -43,16 +39,16 @@ export default class BackgroundComponent {
         type: messages.CONSOLE_HIDE_COMMAND,
       });
     case messages.CONSOLE_ENTERED:
-      return commands.exec(message.text, this.settings.value).catch((e) => {
+      return commands.exec(message.text, settings.value).catch((e) => {
         return browser.tabs.sendMessage(sender.tab.id, {
           type: messages.CONSOLE_SHOW_ERROR,
           text: e.message,
         });
       });
     case messages.SETTINGS_QUERY:
-      return Promise.resolve(this.store.getState().value);
+      return Promise.resolve(this.store.getState().setting.value);
     case messages.CONSOLE_QUERY_COMPLETIONS:
-      return commands.complete(message.text, this.settings.value);
+      return commands.complete(message.text, settings.value);
     case messages.SETTINGS_RELOAD:
       this.store.dispatch(settingsActions.load());
       return this.broadcastSettingsChanged();
diff --git a/src/background/index.js b/src/background/index.js
index 6ba37eb..8a68767 100644
--- a/src/background/index.js
+++ b/src/background/index.js
@@ -1,7 +1,7 @@
 import * as settingsActions from 'settings/actions/setting';
 import messages from 'shared/messages';
 import BackgroundComponent from 'background/components/background';
-import reducers from 'settings/reducers/setting';
+import reducers from 'background/reducers';
 import { createStore } from 'shared/store';
 
 const store = createStore(reducers, (e, sender) => {
@@ -13,9 +13,7 @@ const store = createStore(reducers, (e, sender) => {
     });
   }
 });
+// eslint-disable-next-line no-unused-vars
 const backgroundComponent = new BackgroundComponent(store);
-store.subscribe((sender) => {
-  backgroundComponent.update(sender);
-});
 
 store.dispatch(settingsActions.load());
diff --git a/src/background/reducers/index.js b/src/background/reducers/index.js
new file mode 100644
index 0000000..4be8fac
--- /dev/null
+++ b/src/background/reducers/index.js
@@ -0,0 +1,12 @@
+import settingReducer from 'settings/reducers/setting';
+
+// Make setting reducer instead of re-use
+const defaultState = {
+  setting: settingReducer(undefined, {}),
+};
+
+export default function reducer(state = defaultState, action = {}) {
+  return Object.assign({}, state, {
+    setting: settingReducer(state.setting, action),
+  });
+}