diff --git a/src/actions/index.js b/src/actions/index.js
index 2aa28fa..63c36d2 100644
--- a/src/actions/index.js
+++ b/src/actions/index.js
@@ -13,5 +13,8 @@ export default {
   // Completion
   COMPLETION_SET_ITEMS: 'completion.set.items',
   COMPLETION_SELECT_NEXT: 'completions.select.next',
-  COMPLETION_SELECT_PREV: 'completions.select.prev'
+  COMPLETION_SELECT_PREV: 'completions.select.prev',
+
+  // Settings
+  SETTING_SET_SETTINGS: 'setting.set.settings',
 };
diff --git a/src/actions/setting.js b/src/actions/setting.js
new file mode 100644
index 0000000..d8e889e
--- /dev/null
+++ b/src/actions/setting.js
@@ -0,0 +1,27 @@
+import actions from '../actions';
+import messages from '../content/messages';
+
+const load = () => {
+  return browser.storage.local.get('settings').then((value) => {
+    return set(value.settings);
+  }, console.error);
+};
+
+const save = (settings) => {
+  return browser.storage.local.set({
+    settings
+  }).then(() => {
+    return browser.runtime.sendMessage({
+      type: messages.SETTINGS_RELOAD
+    });
+  });
+};
+
+const set = (settings) => {
+  return {
+    type: actions.SETTING_SET_SETTINGS,
+    settings,
+  };
+};
+
+export { load, save, set };
diff --git a/src/components/setting.js b/src/components/setting.js
new file mode 100644
index 0000000..afbd56c
--- /dev/null
+++ b/src/components/setting.js
@@ -0,0 +1,31 @@
+import * as settingActions from '../actions/setting';
+
+export default class SettingComponent {
+  constructor(wrapper, store) {
+    this.wrapper = wrapper;
+    this.store = store;
+
+    let doc = wrapper.ownerDocument;
+    let form = doc.getElementById('vimvixen-settings-form');
+    form.addEventListener('submit', this.onSubmit.bind(this));
+
+    store.dispatch(settingActions.load());
+  }
+
+  onSubmit(e) {
+    let settings = {
+      json: e.target.elements['plain-json'].value,
+    };
+    this.store.dispatch(settingActions.save(settings));
+    e.preventDefault();
+  }
+
+  update() {
+    let { settings } = this.store.getState();
+
+    let doc = this.wrapper.ownerDocument;
+    let form = doc.getElementById('vimvixen-settings-form');
+    let plainJsonInput = form.elements['plain-json'];
+    plainJsonInput.value = settings.json;
+  }
+}
diff --git a/src/pages/settings.js b/src/pages/settings.js
index 6e00ed3..9bad967 100644
--- a/src/pages/settings.js
+++ b/src/pages/settings.js
@@ -1,22 +1,15 @@
 import './settings.scss';
-import messages from '../content/messages';
+import SettingComponent from '../components/setting';
+import settingReducer from '../reducers/setting';
+import * as store from '../store';
 
-document.addEventListener('DOMContentLoaded', () => {
-  let form = document.getElementById('vimvixen-settings-form');
-  form.addEventListener('submit', (e) => {
-    e.preventDefault();
-    browser.storage.local.set({
-      settings: {
-        json: e.target.elements['plain-json'].value
-      }
-    }).then(() => {
-      return browser.runtime.sendMessage({
-        type: messages.SETTINGS_RELOAD
-      });
-    });
-  });
+const settingStore = store.createStore(settingReducer);
+let settingComponent = null;
+
+settingStore.subscribe(() => {
+  settingComponent.update();
+});
 
-  browser.storage.local.get('settings').then((value) => {
-    form.elements['plain-json'].value = value.settings.json;
-  }, console.error);
+document.addEventListener('DOMContentLoaded', () => {
+  settingComponent = new SettingComponent(document.body, settingStore);
 });
diff --git a/src/reducers/setting.js b/src/reducers/setting.js
new file mode 100644
index 0000000..735d4fb
--- /dev/null
+++ b/src/reducers/setting.js
@@ -0,0 +1,17 @@
+import actions from '../actions';
+
+const defaultState = {
+  settings: {}
+};
+
+export default function reducer(state = defaultState, action = {}) {
+  switch (action.type) {
+  case actions.SETTING_SET_SETTINGS:
+    return Object.assign({}, state, {
+      settings: action.settings,
+    });
+  default:
+    return state;
+  }
+}
+
diff --git a/test/reducers/setting.test.js b/test/reducers/setting.test.js
new file mode 100644
index 0000000..7261be6
--- /dev/null
+++ b/test/reducers/setting.test.js
@@ -0,0 +1,22 @@
+import { expect } from "chai";
+import actions from '../../src/actions';
+import settingReducer from '../../src/reducers/setting';
+
+describe("setting reducer", () => {
+  it('return the initial state', () => {
+    let state = settingReducer(undefined, {});
+    expect(state).to.have.deep.property('settings', {});
+  });
+
+  it('return next state for SETTING_SET_SETTINGS', () => {
+    let action = {
+      type: actions.SETTING_SET_SETTINGS,
+      settings: { value1: 'hello', value2: 'world' },
+    };
+    let state = settingReducer(undefined, action);
+    expect(state).to.have.deep.property('settings', {
+      value1: 'hello',
+      value2: 'world',
+    });
+  });
+});