diff --git a/Easydict/App/AppDelegate.m b/Easydict/App/AppDelegate.m
index 1f5361c5e..4d3f7c9ee 100644
--- a/Easydict/App/AppDelegate.m
+++ b/Easydict/App/AppDelegate.m
@@ -38,6 +38,7 @@ - (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
     
     [self registerRouters];
     
+    [[DarkModeManager manager] updateDarkMode:Configuration.shared.appearance];
     // Change App icon manually.
     //    NSApplication.sharedApplication.applicationIconImage = [NSImage imageNamed:@"white-black-icon"];
 }