diff --git a/INSTALL b/INSTALL
index 122a9f489..59d8ec55e 100644
--- a/INSTALL
+++ b/INSTALL
@@ -5,6 +5,6 @@ make
 make install
 
 For far more in-depth compilation, installation, and removal notes,
-read the Nmap Install Guide at http://nmap.org/install/ .
+read the Nmap Install Guide at https://nmap.org/book/install.html.