diff --git a/README.md b/README.md
index 2a6fedf7..5c9f10a5 100644
--- a/README.md
+++ b/README.md
@@ -363,7 +363,7 @@ Support this project with a :star:
| INPUT | TYPE | REQUIRED | DEFAULT | DESCRIPTION |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|----------|---------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [api\_url](#input_api_url) | string | false | `"${{ github.api_url }}"` | Github API URL. |
-| [base\_sha](#input_base_sha) | string | false | | Specify a different base commit
SHA used for comparing changes |
+| [base\_sha](#input_base_sha) | string | false | | Specify a different base commit
SHA or branch used for
comparing changes |
| [diff\_relative](#input_diff_relative) | string | false | `"true"` | Exclude changes outside the current
directory and show path names
relative to it. **NOTE:** This
requires you to specify the
top level directory via the
`path` input. |
| [dir\_names](#input_dir_names) | string | false | `"false"` | Output unique changed directories instead
of filenames. **NOTE:** This returns
`.` for changed files located
in the current working directory
which defaults to `$GITHUB_WORKSPACE`. |
| [dir\_names\_deleted\_files\_include\_only\_deleted\_dirs](#input_dir_names_deleted_files_include_only_deleted_dirs) | string | false | `"false"` | Include only directories that have
been deleted as opposed to
directory names of files that
have been deleted in the
`deleted_files` output when `dir_names` is
set to `true`. |
@@ -405,7 +405,7 @@ Support this project with a :star:
| [recover\_files\_ignore\_separator](#input_recover_files_ignore_separator) | string | false | `"\n"` | Separator used to split the
`recover_files_ignore` input |
| [recover\_files\_separator](#input_recover_files_separator) | string | false | `"\n"` | Separator used to split the
`recover_files` input |
| [separator](#input_separator) | string | false | `" "` | Split character for output strings |
-| [sha](#input_sha) | string | false | | Specify a different commit SHA
used for comparing changes |
+| [sha](#input_sha) | string | false | | Specify a different commit SHA
or branch used for comparing
changes |
| [since](#input_since) | string | false | | Get changed files for commits
whose timestamp is older than
the given time. |
| [since\_last\_remote\_commit](#input_since_last_remote_commit) | string | false | `"false"` | Use the last commit on
the remote branch as the
`base_sha`. Defaults to the last
non-merge commit on the target
branch for pull request events
and the previous remote commit
of the current branch for
push events. |
| [skip\_initial\_fetch](#input_skip_initial_fetch) | string | false | `"false"` | Skip the initial fetch to
improve performance for shallow repositories.
**NOTE**: This could lead to
errors with missing history and
the intended use is limited
to when you've fetched the
history necessary to perform the
diff. |