diff --git a/README.md b/README.md
index 23b3bfe..3124cb7 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,7 @@ A pixiv downloader written in Rust.
 - [ ] Add support for multiple threads download.
 - [ ] Batch download.
 - [ ] Fanbox support.
+- [ ] Remove parse_duration dependency which used in unittest.
 ## Rust features flags
 ### all
 Enable all unconflicted features, this will enable [`exif`](#exif) and [`ugoira`](#ugoira).