diff --git a/README.md b/README.md
index 0522d7b..e77b6e5 100644
--- a/README.md
+++ b/README.md
@@ -137,6 +137,8 @@ jobs:
 
 💡 By default not specifying `fromTag` or `toTag` will resolve `toTag` from either the `ref` or alternatively fallback to the latest tag from the git API. `fromTag` is resolved by sorting tags using [semver](https://semver.org/). Check the [configuration](#configuration-specification) for alternatives.
 
+💡 `fromTag` and `toTag` not just `tag`, they can be any legal git's `ref`
+
 ### Configuration
 
 The action supports flexible configuration options to modify vast areas of its behavior. To do so, provide the configuration file to the workflow using the `configuration` setting.
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,