diff --git a/README.md b/README.md
index c9102260..af3d2e29 100644
--- a/README.md
+++ b/README.md
@@ -39,6 +39,8 @@ The Model Context Protocol allows applications to provide context for LLMs in a
 npm install @modelcontextprotocol/sdk
 ```
 
+> ⚠️ MCP requires Node v18.x up to work fine.
+
 ## Quick Start
 
 Let's create a simple MCP server that exposes a calculator tool and some data: