diff --git a/README.md b/README.md
index 4ba5f6e..2c0ac66 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,46 @@
-= ipset updater
+# ipset updater
 
-= install
+Bash + Python ipset list updater
 
-* git clone this
-* launch ./install.sh
-* launch ./ipset_update.sh for first time
+### Prerequisites
+
+* ipset
+* shorewall
+
+```
+apt install ipset shorewall
+```
+
+### Installing
+
+
+git clone
+
+```
+git clone https://git.k3nny.fr/Tools/ipset_updater.git
+```
+
+install cron task
+
+```
+./install.sh
+```
+
+launch for first time
+
+```
+./ipset_update.sh
+```
+
+## Using in shorewall
+
+Add these rules in `/etc/shorewall/rules` :
+
+```
+DROP		net:+blacklist	$FW
+DROP		net:+blacklist_ipv4	$FW
+DROP		net:+blacklist_net	$FW
+DROP		$FW			net:+blacklist
+DROP		$FW			net:+blacklist_net
+DROP		$FW			net:+blacklist_ipv4
+```