diff --git a/README.md b/README.md
index 4ec8202..d845206 100644
--- a/README.md
+++ b/README.md
@@ -32,6 +32,8 @@ The path to your commitlint config file.
 
 Default: `commitlint.config.js`
 
+If the config file doesn't exist, [config-conventional](https://github.com/conventional-changelog/commitlint/tree/master/%40commitlint/config-conventional) settings will be loaded as a default fallback.
+
 ### `firstParent`
 
 When set to true, we follow only the first parent commit when seeing a merge commit.
diff --git a/action.yml b/action.yml
index 7200788..f4e8d69 100644
--- a/action.yml
+++ b/action.yml
@@ -3,7 +3,7 @@ description: Lints Pull Request commit messages with commitlint
 author: Wagner Santos
 inputs:
   configFile:
-    description: Commitlint config file
+    description: Commitlint config file. If the file doesn't exist, config-conventional settings will be loaded as a fallback.
     default: ./commitlint.config.js
     required: false
   firstParent: