diff --git a/README.md b/README.md
index c3de999..ab99d6f 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,8 @@
 
 An action that executes given Ansible playbook on selected hosts.
 
+Should work on any OS, if `ansible-playbook` command is available in `PATH`.
+
 ## Usage
 
 ```yaml