diff --git a/intro/modules/ROOT/nav.adoc b/intro/modules/ROOT/nav.adoc
index 7371fd2..66bd559 100644
--- a/intro/modules/ROOT/nav.adoc
+++ b/intro/modules/ROOT/nav.adoc
@@ -1,2 +1,2 @@
 * xref:index.adoc[Network Scanning]
-* xref:exer.adoc[exercises]
+* xref:exer.adoc[Exercises]