Update README.md.
diff --git a/README.md b/README.md
index c1232bf..8558700 100644
--- a/README.md
+++ b/README.md
@@ -139,7 +139,7 @@ consideration.
- [ ] Subscript: `matrix A~i,j~`
- **Miscellaneous:**
- - [ ] Permissive ATX headers: `###Header` (without space)
+ - [x] Permissive ATX headers: `###Header` (without space)
- [ ] Permissive autolinks: `http://google.com` (without `<`...`>`)
- [ ] Disabling indented code blocks
- [ ] Disabling raw HTML blocks/spans