diff --git a/README.md b/README.md
index 256cab3..6301c37 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,63 @@ A async/await native implementation of the RADIUS server and client for Rust.
 
 ## Description
 
-TBD
+**THIS PROJECT IS UNDER DEVELOPMENT STATUS. IT WOULD CHANGE WITHOUT NOTICES.**
+
+This RADIUS server and client implementation use [tokio](https://tokio.rs/) to support asynchronous operations natively. This implementation satisfies basic functions that are described in [RFC2865](https://tools.ietf.org/html/rfc2865).
+
+This supports the following RFC dictionaries at the moment:
+
+- [RFC2865](https://tools.ietf.org/html/rfc2865)
+- [RFC2866](https://tools.ietf.org/html/rfc2866)
+- [RFC2867](https://tools.ietf.org/html/rfc2867)
+
+## Usage
+
+Simple example implementations are here:
+
+- [server](./examples/server.rs)
+- [client](./examples/client.rs)
+
+## Roadmap
+
+- timeout feature on the client
+- retransmission feature on the client
+- Support the following RFC dictionaries:
+  - rfc2868
+  - rfc2869
+  - rfc3162
+  - rfc3576
+  - rfc3580
+  - rfc4072
+  - rfc4372
+  - rfc4603
+  - rfc4675
+  - rfc4679
+  - rfc4818
+  - rfc4849
+  - rfc5090
+  - rfc5176
+  - rfc5447
+  - rfc5580
+  - rfc5607
+  - rfc5904
+  - rfc6519
+  - rfc6572
+  - rfc6677
+  - rfc6911
+  - rfc6929
+  - rfc6930
+  - rfc7055
+  - rfc7155
+  - rfc7268
+  - rfc7499
+  - rfc7930
+  - rfc8045
+  - rfc8559
+
+## Note
+
+This implementation and design are based on [layeh/radius](https://github.com/layeh/radius).
 
 ## Author