diff --git a/History.md b/History.md
index df11f48..679f32a 100644
--- a/History.md
+++ b/History.md
@@ -1,4 +1,10 @@
 
+5.12.2 / 2019-07-10
+==================
+
+**fixes**
+  * [[`c23bab4`](http://github.com/koajs/session/commit/c23bab4023b95c65be46b4eeaf089608ddaa738e)] - fix: remvoe unused code (dead-horse <<dead_horse@qq.com>>)
+
 5.12.1 / 2019-07-10
 ==================
 
diff --git a/package.json b/package.json
index a1a072a..1395265 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "name": "koa-session",
   "description": "Koa cookie session middleware with external store support",
   "repository": "koajs/session",
-  "version": "5.12.1",
+  "version": "5.12.2",
   "keywords": [
     "koa",
     "middleware",