diff --git a/README.md b/README.md
index ed8bde6..155b4cb 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,7 @@
 > Lua module to allow ip (or not) from CrowdSec API.
 
 This library is used by different bouncers :
+:warning: This library will only with [lua-nginx-module](https://github.com/openresty/lua-nginx-module) 
 
 * [Nginx Bouncer](https://docs.crowdsec.net/docs/next/bouncers/nginx)
 * [OpenResty Bouncer](https://docs.crowdsec.net/docs/next/bouncers/openresty)