feat: release 0.2.0
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8433b54..6e81d6f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -23,8 +23,22 @@
 
 ## Table of Contents
 
+- [0.2.0](#020)
 - [0.1.0](#010)
 
+## 0.2.0
+
+### Feature
+
+- :sunrise: feat: support Var API [#31](https://github.com/apache/apisix/pull/31)
+- :sunrise: feat: provide default APISIX_CONF_EXPIRE_TIME to simplify thing [#30](https://github.com/apache/apisix/pull/30)
+- :sunrise: feat: handle idempotent key in PrepareConf [#27](https://github.com/apache/apisix/pull/27)
+
+### Bugfix
+
+- fix: a race when reusing flatbuffers.Builder [#35](https://github.com/apache/apisix/pull/35)
+- fix: the default socket permission is not enough [#25](https://github.com/apache/apisix/pull/25)
+
 ## 0.1.0
 
 ### Feature
diff --git a/docs/en/latest/config.json b/docs/en/latest/config.json
index 4f0d229..b47e193 100644
--- a/docs/en/latest/config.json
+++ b/docs/en/latest/config.json
@@ -1,5 +1,5 @@
 {
-  "version": 0.1,
+  "version": 0.2,
   "sidebar": [
     {
       "type": "doc",
diff --git a/docs/en/latest/developer-guide.md b/docs/en/latest/developer-guide.md
index ef8b71c..f1f396e 100644
--- a/docs/en/latest/developer-guide.md
+++ b/docs/en/latest/developer-guide.md
@@ -27,7 +27,7 @@
 
 ## Build
 
-Run `make build`. Then you can run `APISIX_LISTEN_ADDRESS=unix:/tmp/runner.sock APISIX_CONF_EXPIRE_TIME=3600 ./go-runner run`
+Run `make build`. Then you can run `APISIX_LISTEN_ADDRESS=unix:/tmp/runner.sock ./go-runner run`
 to start it.
 
 ## Test
diff --git a/docs/en/latest/getting-started.md b/docs/en/latest/getting-started.md
index 6206138..78bc87a 100644
--- a/docs/en/latest/getting-started.md
+++ b/docs/en/latest/getting-started.md
@@ -24,7 +24,7 @@
 ## Prerequisites
 
 * Go (>= 1.15)
-* APISIX (>= 2.7.0)
+* APISIX (>= 2.9.0)
 
 ## Installation