diff --git a/README.md b/README.md
index b1667b0..aae1b5a 100644
--- a/README.md
+++ b/README.md
@@ -570,7 +570,7 @@ Table of descriptions for the `configuration.json` options to configure the resu
 | exclude_merge_branches      | An array of branches to be ignored from processing as merge commits                                                                                                                                                                |
 | tag_resolver                | Section to provide configuration for the tag resolving logic. Used if no `fromTag` is provided                                                                                                                                     |
 | tag_resolver.method         | Defines the method to use. Current options are: `semver`, `sort`. Default: `semver`                                                                                                                                                |
-| tag_resolver.filter         | Defines a regex object which is used to filter out tags not matching.                                                                                                                                                              |
+| tag_resolver.filter         | Defines a regex in JavaScript format (e.g. double backslash to escape a dot `\\.`) to include all matching tags and exclude the rest. Use negative lookahead to exclude tags. For example, `api.*` will only *include* tags starting with "api", `^(?!alpha).*` will *exclude* all tags starting with "alpha".|
 | tag_resolver.transformer    | Defines a regex transformer used to optionally transform the tag after the filter was applied. Allows to adjust the format to e.g. semver.                                                                                         |
 | base_branches               | The target branches for the merged PR, ingnores PRs with different target branch. Values can be a `regex`. Default: allow all base branches                                                                                        |
 | trim_values                 | Defines if all values inserted in templates are `trimmed`. Default: false                                                                                                                                                          |