diff --git a/mobile/src/main/java/com/github/shadowsocks/App.kt b/mobile/src/main/java/com/github/shadowsocks/App.kt
index a15b67eb..a73a2452 100644
--- a/mobile/src/main/java/com/github/shadowsocks/App.kt
+++ b/mobile/src/main/java/com/github/shadowsocks/App.kt
@@ -118,6 +118,7 @@ class App : Application() {
         app = this
         if (!BuildConfig.DEBUG) System.setProperty(LocalLog.LOCAL_LOG_LEVEL_PROPERTY, "ERROR")
         AppCompatDelegate.setCompatVectorFromResourcesEnabled(true)
+        AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO)
         PreferenceFragmentCompat.registerPreferenceFragment(IconListPreference::class.java,
                 BottomSheetPreferenceDialogFragment::class.java)