diff --git a/README.md b/README.md
index 1662fa8b..3f93f47e 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,9 @@ This action sets up a ruby environment for versions which are installed on the [
 
 > Only supports `2.4.x`, `2.5.x`, and `2.6.x`.  
 
+If you want to use exact versions (e.g., `2.6.5`) of Ruby, or to use JRuby or TruffleRuby,
+please take a look at other actions such as [use-ruby-action](https://github.com/eregon/use-ruby-action).
+
 # Usage
 
 See [action.yml](action.yml)