diff --git a/CHANGELOG.md b/CHANGELOG.md
index eb5ebecc..085c01e3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,14 @@
+<a name="1.1.5"></a>
+## [1.1.5](https://github.com/vuejs/composition-api/compare/v1.1.4...v1.1.5) (2021-09-09)
+
+
+### Bug Fixes
+
+* improve `isReadonly` behaviour, close [#811](https://github.com/vuejs/composition-api/issues/811), close [#812](https://github.com/vuejs/composition-api/issues/812) ([d3c456a](https://github.com/vuejs/composition-api/commit/d3c456a))
+* **api-watch:** watching nested ref array w/ deep doesn't work ([#808](https://github.com/vuejs/composition-api/issues/808)) ([b625420](https://github.com/vuejs/composition-api/commit/b625420))
+
+
+
 <a name="1.1.4"></a>
 ## [1.1.4](https://github.com/vuejs/composition-api/compare/v1.1.3...v1.1.4) (2021-08-31)
 
diff --git a/README.md b/README.md
index c57faa5a..fb3822bd 100644
--- a/README.md
+++ b/README.md
@@ -41,7 +41,7 @@ Include `@vue/composition-api` after Vue and it will install itself automaticall
 <!--cdn-links-start-->
 ```html
 <script src="https://cdn.jsdelivr.net/npm/vue@2.6"></script>
-<script src="https://cdn.jsdelivr.net/npm/@vue/composition-api@1.1.4"></script>
+<script src="https://cdn.jsdelivr.net/npm/@vue/composition-api@1.1.5"></script>
 ```
 <!--cdn-links-end-->
 
diff --git a/README.zh-CN.md b/README.zh-CN.md
index ba8e01f5..ee9e8b44 100644
--- a/README.zh-CN.md
+++ b/README.zh-CN.md
@@ -40,7 +40,7 @@ import { ref, reactive } from '@vue/composition-api'
 <!--cdn-links-start-->
 ```html
 <script src="https://cdn.jsdelivr.net/npm/vue@2.6"></script>
-<script src="https://cdn.jsdelivr.net/npm/@vue/composition-api@1.1.4"></script>
+<script src="https://cdn.jsdelivr.net/npm/@vue/composition-api@1.1.5"></script>
 ```
 <!--cdn-links-end-->
 
diff --git a/package.json b/package.json
index a6ab35c2..8802852e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@vue/composition-api",
-  "version": "1.1.4",
+  "version": "1.1.5",
   "description": "Provide logic composition capabilities for Vue.",
   "keywords": [
     "vue",