diff --git a/README.adoc b/README.adoc
index 1d47df0..82f4b34 100644
--- a/README.adoc
+++ b/README.adoc
@@ -4,13 +4,19 @@ Provides an exporter to scan known DNSBL-provides for listing of target-IP.
 
 == Installation
 
-You have to installed ruby and bundler.
+1. You have to installed `ruby` and `bundler`:
 
-1. Clone the repository to the destination, you want to have installed dnsbl_exporter.
-2. 
+	apt install ruby
+	gem install bundler
+
+2. Clone the repository to the destination, you want to have installed dnsbl_exporter.
+
+3. Start on boot:
 +
 	useradd prometheus
 	sudo -u prometheus bundle install
 	erb dnsbl_exporter.service.erb > /etc/systemd/system/dnsbl_exporter.service
 	systemctl daemon-reload
 	systemctl enable --now dnsbl_exporter.service
+
+4. In prometheus, define the target-IP as `target`.
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