diff --git a/doc/index.md b/doc/index.md
index e24b22fdfba92b7f54007551e86bc8386cd075bd..5460833f281d4fbb92cd30cbd6ef1818abdbc87c 100644
--- a/doc/index.md
+++ b/doc/index.md
@@ -1,6 +1,6 @@
 <img src="images/logos/TeraFlowSDN_tr.png" alt="drawing" width="200"/>
 
-Welcome to the ETSI TeraFlowSDN (TFS) Controller wiki!
+Welcome to the ETSI TeraFlowSDN (TFS) Controller wiki! v4.0
 
 This wiki provides a walkthrough on how to prepare your environment for executing and contributing to the [ETSI TeraFlowSDN SDG](https://tfs.etsi.org/).
 Besides, it describes how to run some example experiments.