diff --git a/History.md b/History.md
index f188cfd..4abb753 100644
--- a/History.md
+++ b/History.md
@@ -2,6 +2,7 @@
 2.0.0 /
 ==================
 
+ * fix(response): correct response.writable logic (#782)
  * merge v1.1.2 and v1.2.0 changes
  * include `koa-convert` so that generator functions still work
    * NOTE: generator functions are deprecated in v2 and will be removed in v3
diff --git a/package.json b/package.json
index 352aba5..25d99fe 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "koa",
-  "version": "2.0.0-alpha.3",
+  "version": "2.0.0-alpha.4",
   "description": "Koa web app framework",
   "main": "lib/application.js",
   "scripts": {