diff --git a/browser/main/Main.js b/browser/main/Main.js
index fa632eef..a3bdc28f 100644
--- a/browser/main/Main.js
+++ b/browser/main/Main.js
@@ -17,7 +17,7 @@ import store from 'browser/main/store'
 import i18n from 'browser/lib/i18n'
 import { getLocales } from 'browser/lib/Languages'
 import applyShortcuts from 'browser/main/lib/shortcutManager'
-import theme from 'browser/main/lib/ThemeManager'
+import {chooseTheme, applyTheme} from 'browser/main/lib/ThemeManager'
 const path = require('path')
 const electron = require('electron')
 const { remote } = electron
@@ -142,11 +142,11 @@ class Main extends React.Component {
     const { dispatch, config } = this.props
 
     this.refreshTheme = setInterval(() => {
-      theme.choose(ConfigManager.get().ui)
+      chooseTheme(ConfigManager.get().ui)
     }, 5 * 1000)
 
-    theme.choose(config.ui)
-    theme.apply(config.ui.theme)
+    chooseTheme(config.ui)
+    applyTheme(config.ui.theme)
 
     if (getLocales().indexOf(config.ui.language) !== -1) {
       i18n.setLocale(config.ui.language)
diff --git a/browser/main/lib/ConfigManager.js b/browser/main/lib/ConfigManager.js
index 40d0771e..f39eb32e 100644
--- a/browser/main/lib/ConfigManager.js
+++ b/browser/main/lib/ConfigManager.js
@@ -2,8 +2,7 @@ import _ from 'lodash'
 import RcParser from 'browser/lib/RcParser'
 import i18n from 'browser/lib/i18n'
 import ee from 'browser/main/lib/eventEmitter'
-import theme from 'browser/main/lib/ThemeManager'
-
+import {chooseTheme, applyTheme} from 'browser/main/lib/ThemeManager'
 const OSX = global.process.platform === 'darwin'
 const win = global.process.platform === 'win32'
 const electron = require('electron')
@@ -151,8 +150,8 @@ function set (updates) {
   if (!validate(newConfig)) throw new Error('INVALID CONFIG')
   _save(newConfig)
 
-  theme.choose(newConfig.ui)
-  theme.apply(newConfig.ui.theme)
+  chooseTheme(newConfig.ui)
+  applyTheme(newConfig.ui.theme)
 
   i18n.setLocale(newConfig.ui.language)
 
diff --git a/browser/main/lib/ThemeManager.js b/browser/main/lib/ThemeManager.js
index 0cab6c2d..a6be2f82 100644
--- a/browser/main/lib/ThemeManager.js
+++ b/browser/main/lib/ThemeManager.js
@@ -1,5 +1,4 @@
-function choose (ui) {
-  console.log(ui.enableScheduleTheme)
+const chooseTheme = (ui) => {
   if (!ui.enableScheduleTheme) {
     return
   }
@@ -10,31 +9,25 @@ function choose (ui) {
   const now = new Date()
   const minutes = now.getHours() * 60 + now.getMinutes()
 
-  console.log(ui.scheduleStart, minutes, ui.scheduleEnd)
+  const isEndAfterStart = end > start
+  const isBetweenStartAndEnd = minutes >= start && minutes <= end
+  const isBetweenEndAndStart = (minutes >= start || minutes <= end)
 
-  if ((end > start && minutes >= start && minutes <= end) ||
-    (start > end && (minutes >= start || minutes <= end))) {
-    console.log('SC', ui.theme, ui.scheduledTheme)
+  if ((isEndAfterStart && isBetweenStartAndEnd) || (!isEndAfterStart && isBetweenEndAndStart)) {
     if (ui.theme !== ui.scheduledTheme) {
       ui.defaultTheme = ui.theme
       ui.theme = ui.scheduledTheme
-      apply(ui.theme)
+      applyTheme(ui.theme)
     }
-
-    console.log(ui.defaultTheme, ui.theme)
   } else {
-    console.log('TH', ui.theme, ui.defaultTheme)
     if (ui.theme !== ui.defaultTheme) {
       ui.theme = ui.defaultTheme
-      apply(ui.theme)
+      applyTheme(ui.theme)
     }
-
-    console.log(ui.theme)
   }
 }
 
-function apply (theme) {
-  console.log('Apply ', theme)
+const applyTheme = (theme) => {
   const supportedThemes = ['dark', 'white', 'solarized-dark', 'monokai', 'dracula']
   if (supportedThemes.indexOf(theme) !== -1) {
     document.body.setAttribute('data-theme', theme)
@@ -43,7 +36,7 @@ function apply (theme) {
   }
 }
 
-export default {
-  choose,
-  apply
+module.exports = {
+  chooseTheme,
+  applyTheme
 }