diff --git a/README.md b/README.md
index 636e86c..d554d48 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ A CLI to-do app written in Rust.
 | [ ] | `todo add --category {_category_} {_task_}` | adds \_task\_ to the tasks with category \_category\_ |
 | [ ] | `todo did {_number_}` | mark a task with number \_number\_ as completed |
 | [ ] | `todo undid {_number_}` | mark a task with number \_number\_ as not completed |
-| [ ] | `todo update --category {new_category} {}` | updates the category of existing task |
+| [ ] | `todo update --category {new_category} {_task_id_}` | updates the category of existing task |
 | [ ] | `todo delete {_task_id_}` | deletes the task with id \_task\_id\_ |
  
 __Example of todo lists__ <br>