diff --git a/README.md b/README.md
index 4f889a9b..9fa2801e 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,8 @@
 Generate your metrics that you can embed everywhere, including your GitHub profile readme! It works for both user and organization accounts, and even for repositories!
 
 
+> <sup>*⚠️ This is the documentation of **v3.9-beta** (`@master` branch) which includes [unreleased features](https://github.com/lowlighter/metrics/compare/latest...master), see documentation of [**v3.8** (`@latest` branch) here](https://github.com/lowlighter/metrics/blob/latest/README.md).*</sup>
+
 
 <table>
   <tr>
diff --git a/action.yml b/action.yml
index 4e32a7ef..b972aa3d 100644
--- a/action.yml
+++ b/action.yml
@@ -605,6 +605,7 @@ inputs:
     default: 5
   
   # Filter events by age
+  # Note that it only filter fetched events, you may need to increase "plugin_activity_limit" to display older events
   # Set to 0 to disable age filtering
   plugin_activity_days:
     description: Maximum event age