diff --git a/Flow.Launcher.Infrastructure/UserSettings/Settings.cs b/Flow.Launcher.Infrastructure/UserSettings/Settings.cs
index cf194b366..1cccc38d9 100644
--- a/Flow.Launcher.Infrastructure/UserSettings/Settings.cs
+++ b/Flow.Launcher.Infrastructure/UserSettings/Settings.cs
@@ -113,6 +113,7 @@ namespace Flow.Launcher.Infrastructure.UserSettings
                 if (_settingWindowFont != value)
                 {
                     _settingWindowFont = value;
+                    OnPropertyChanged();
                     Application.Current.Resources["SettingWindowFont"] = new FontFamily(value);
                     Application.Current.Resources["ContentControlThemeFontFamily"] = new FontFamily(value);
                 }