diff --git a/nex/nex-php/index.gmi b/nex/nex-php/index.gmi
index c0f22fa..f473219 100644
--- a/nex/nex-php/index.gmi
+++ b/nex/nex-php/index.gmi
@@ -12,4 +12,5 @@ nex-php includes
 * Client - simple layer allows PHP application communicate with Nex server
 * Server - to launch instance for static files or interactive apps
 
-=> https://github.com/YGGverse/nex-php GitHub
\ No newline at end of file
+=> https://github.com/YGGverse/nex-php GitHub
+=> nex://nightfall.city/nex/ Specification
\ No newline at end of file