diff --git a/TODO.md b/TODO.md
index 279d6472..2b7e2282 100644
--- a/TODO.md
+++ b/TODO.md
@@ -9,7 +9,7 @@ https://zhuanlan.zhihu.com/p/39369370
 - [x] Fix combo dropdown hidden in topmost window
 - [x] New `GuiListControl::IItemArranger` with different item height
   - [ ] Correctly implement `FreeHeightItemArranger::EnsureItemVisible`
-- [ ] Change `GuiControl::Font` from `FontProperties` to `Nullable<FontProperties>`. It will changes following parent controls if it is set to null. If `GuiControlHost`'s font is null, it will become the default font.
+- [x] Change `GuiControl::Font` from `FontProperties` to `Nullable<FontProperties>`. It will changes following parent controls if it is set to null. If `GuiControlHost`'s font is null, it will become the default font.
 - [ ] Window Icon
 - [ ] Fix GacGen crash when defining an instance whose name conflicts with something from imported resources
 - [ ] Fix GacGen reports only "error dumping resource file" while the resource file contains some syntax errors preventing GacGen from reading it