diff --git a/CHANGELOG.md b/CHANGELOG.md
index 187f501..0802fd8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,3 +6,14 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](https://semver.org/).
 
 ## [Unreleased]
+
+## v0.1.0 - 2021-08-23
+
+### Added
+
+- feat: Implement basic stream logic (#1)
+- feat: Implement stream logic via Multipart (#4)
+- feat: Add check for multipart (#7)
+- test: Implement integration tests (#8)
+- feat: Add ReadFrom support (#10)
+- feat: Add ratelimit support (#11) 
diff --git a/README.md b/README.md
index b947208..a48553b 100644
--- a/README.md
+++ b/README.md
@@ -7,3 +7,75 @@ This lib will maintain data between under and upper storage layer.
 ## Status
 
 This project is a **Proof of Concept**, please connect with us via issues if you have interest on it.
+
+## Usage
+
+### Init a stream
+
+Init a stream via upper and under storage.
+All data will be written into upper first.
+`go-stream` will persist data from upper to under async.
+
+```go
+s, err := stream.NewWithConfig(&stream.Config{
+    Upper:         upperStore,
+    Under:         underStore,
+    // Set speed limit here to prevent upper been written too fast.
+    SpeedLimit:    10 * 1024 * 1024,
+    PersistMethod: stream.PersistMethodMultipart,
+})
+if err != nil {
+	return err
+}
+go s.Serve()
+go func() {
+    for v := range s.Errors() {
+        log.Printf("got error: %v", v)
+    }
+}()
+```
+
+### Start a new branch
+
+```go
+br, err := s.StartBranch(id, name)
+if err != nil {
+	return err
+}
+```
+
+### Write data into a branch
+
+- `Write`
+
+Data should be written in order.
+
+```go
+n, err := br.Write(uint64(i), bs)
+if err != nil {
+    t.Fatal(err)
+}
+```
+
+- `ReadFrom`
+
+Data will be read from the Reader until `io.EOF`.
+
+```go
+n, err := br.ReadFrom(r)
+if err != nil {
+    t.Fatal(err)
+}
+```
+
+### Complete a branch
+
+Call `Complete` to finish a branch write job.
+Only after this call, the written data is persisted.
+
+```go
+err = br.Complete()
+if err != nil {
+    t.Fatal(err)
+}
+```