diff --git a/TODO.md b/TODO.md
index 22ff3c16..84127b8f 100644
--- a/TODO.md
+++ b/TODO.md
@@ -56,7 +56,7 @@ https://zhuanlan.zhihu.com/p/33778843
   - Find someday to fix it
 - [x] **Update Release**
 - [ ] Normal text box supports surrogate pairs like document viewer
-- [ ] Demo: TriplePhaseImageButton using `Context` property
+- [x] Demo: TriplePhaseImageButton using `Context` property
 - [ ] Demo: `<SharedSize>` and `<SharedSizeRoot>`
   - [ ] sync all buttons in item templates in a list control
   - [ ] Two columns in repeat flow