diff --git a/intro/modules/ROOT/pages/index.adoc b/intro/modules/ROOT/pages/index.adoc
index fc001a6..39d3bee 100644
--- a/intro/modules/ROOT/pages/index.adoc
+++ b/intro/modules/ROOT/pages/index.adoc
@@ -70,7 +70,7 @@ testnetwork2_worker_2.testnetwork2_net (172.21.0.6)
 ====
 Nmap, short for Network Mapper, is a free, open-source tool for vulnerability scanning and network discovery. Network administrators use Nmap to identify what devices are running on their systems, discovering hosts that are available and the services they offer, finding open ports and detecting security risks.
 
-See https://en.wikipedia.org/wiki/Nmap
+See https://en.wikipedia.org/wiki/Nmap[Nmap-wikipedia^]
 ====