diff --git a/README.md b/README.md
index ef73fbb73..68d5d071b 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,8 @@ Click the `Use this Template` and provide the new repo details for your action
 
 ## Code in Main
 
+> First, you'll need to have a reasonably modern version of `node` handy. This won't work with versions older than 9, for instance.
+
 Install the dependencies  
 ```bash
 $ npm install