diff --git a/README.md b/README.md
index 0522d7b..d877bb9 100644
--- a/README.md
+++ b/README.md
@@ -263,8 +263,8 @@ For advanced use cases additional settings can be provided to the action
 | `outputFile`        | Optional relative path to a file to store the resulting changelog in.                                                                                                       |
 | `owner`             | The owner of the repository to generate the changelog for                                                                                                                   |
 | `repo`              | Name of the repository we want to process                                                                                                                                   |
-| `fromTag`           | Defines the 'start' from where the changelog will consider merged pull requests                                                                                             |
-| `toTag`             | Defines until which tag the changelog will consider merged pull requests                                                                                                    |
+| `fromTag`           | Defines the 'start' from where the changelog will consider merged pull requests (can be a tag or a valid git ref)                                                           |
+| `toTag`             | Defines until which tag the changelog will consider merged pull requests  (can be a tag or a valid git ref)                                                                 |
 | `path`              | Allows to specify an alternative sub directory, to use as base                                                                                                              |
 | `token`             | Alternative config to specify token. You should prefer `env.GITHUB_TOKEN` instead though                                                                                    |
 | `baseUrl`           | Alternative config to specify base url for GitHub Enterprise authentication. Default value set to `https://api.github.com`                                                  |
diff --git a/src/releaseNotes.ts b/src/releaseNotes.ts
index bd5a075..9abbd56 100755
--- a/src/releaseNotes.ts
+++ b/src/releaseNotes.ts
@@ -214,7 +214,7 @@ export class ReleaseNotes {
 
     core.info(`ℹ️ Retrieved ${prCommits.length} commits for ${owner}/${repo}`)
 
-    return prCommits.map(function (commit) {
+    return prCommits.map(function (commit): PullRequestInfo {
       return {
         number: 0,
         title: commit.summary,