Draft release note for 0.5.1 (#91)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5f46ac9..ed07dcf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+# 0.5.1
+- Fix `sw` header is not validated and might cause service unavailable. (#90)
+
 # 0.5.0
 - Bump up grpc-node to 1.6.7 to fix CVE-2022-25878 (#85)
 - Fix issue #9165 express router entry duplicated (#84)
diff --git a/package-lock.json b/package-lock.json
index ba851e3..6fc7908 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "skywalking-backend-js",
-  "version": "0.5.0",
+  "version": "0.5.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index add81fb..0779024 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "skywalking-backend-js",
-  "version": "0.5.0",
+  "version": "0.5.1",
   "description": "The NodeJS agent for Apache SkyWalking",
   "homepage": "skywalking.apache.org",
   "main": "lib/index.js",