diff --git a/raspi-docker/modules/ROOT/pages/index-install.adoc b/raspi-docker/modules/ROOT/pages/index-install.adoc
index 1143355..1c99794 100644
--- a/raspi-docker/modules/ROOT/pages/index-install.adoc
+++ b/raspi-docker/modules/ROOT/pages/index-install.adoc
@@ -14,6 +14,12 @@ apt-get install -y nodejs
 npm install -g pm2
 ----
 
+== Install optional
+
+[source,sh]
+----
+apt-get install raspberrypi-kernel-headers -y
+----
 
 == Download and install Docker.