diff --git a/app/src/main/kotlin/cn/super12138/todo/constants/Constants.kt b/app/src/main/kotlin/cn/super12138/todo/constants/Constants.kt
index 1080325..13fac07 100644
--- a/app/src/main/kotlin/cn/super12138/todo/constants/Constants.kt
+++ b/app/src/main/kotlin/cn/super12138/todo/constants/Constants.kt
@@ -13,7 +13,7 @@ object Constants {
     const val PREF_PALETTE_STYLE_DEFAULT = 1 // TonalSpot
 
     const val PREF_DARK_MODE = "dark_mode"
-    const val PREF_DARK_MODE_DEFAULT = 1 // Follow System
+    const val PREF_DARK_MODE_DEFAULT = -1 // Follow System
 
     const val PREF_CONTRAST_LEVEL = "contrast_level"
     const val PREF_CONTRAST_LEVEL_DEFAULT = 0f // Normal