diff --git a/README.md b/README.md
index 327bb42..56ba0b9 100644
--- a/README.md
+++ b/README.md
@@ -6,3 +6,40 @@
 # Luzifer / rootzone
 
 `rootzone` is a small util for my [personal-dns](https://github.com/luzifer-docker/personal-dns) project to collect all IANA and OpenNIC TLDs and generate a named stub file for bind to be able to resolve those TLDs without delegation to third-party nameservers which might be modifying the original responses from the root nameservers.
+
+## Building
+
+```console
+$ go get github.com/Luzifer/rootzone
+```
+
+## Usage
+
+```console
+$ rootzone --help
+Usage of rootzone:
+      --concurrency-limit int       How many queries to execute in parallel (default 50)
+      --iana-filter strings         IANA TLDs to igore (default [arpa.])
+      --iana-tld-list string        IANA TLD list file (default "https://data.iana.org/TLD/tlds-alpha-by-domain.txt")
+      --internic-root-file string   Internic root nameserver file (default "https://www.internic.net/domain/named.root")
+      --log-level string            Log level (debug, info, warn, error, fatal) (default "info")
+      --opennic-filter strings      OpenNIC TLDs to ignore (default [.,opennic.glue.])
+      --opennic-root string         OpenNIC root server (default "75.127.96.89:53")
+      --version                     Prints current version and exits
+```
+
+```console
+$ rootzone | head -n12
+# Autogenerated with rootzone dev
+#
+zone "aaa." in {
+  type static-stub;
+  server-addresses { 156.154.144.2; 156.154.145.2; 156.154.156.2; 156.154.157.2; 156.154.158.2; 156.154.159.2; };
+};
+#
+zone "aarp." in {
+  type static-stub;
+  server-addresses { 192.42.173.30; 192.42.174.30; 192.42.175.30; 192.42.176.30; };
+};
+#
+```