diff --git a/CHANGELOG.md b/CHANGELOG.md
index 82202adf..b63da68e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,13 @@
+<a name="1.0.5"></a>
+## [1.0.5](https://github.com/vuejs/composition-api/compare/v1.0.4...v1.0.5) (2021-08-01)
+
+
+### Bug Fixes
+
+* **function:** properties of function should not disappear. ([#778](https://github.com/vuejs/composition-api/issues/778)) ([68c1a35](https://github.com/vuejs/composition-api/commit/68c1a35))
+
+
+
 <a name="1.0.4"></a>
 ## [1.0.4](https://github.com/vuejs/composition-api/compare/v1.0.3...v1.0.4) (2021-07-22)
 
diff --git a/README.md b/README.md
index 2cdaa336..57c2106c 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@1.0.4"></script>
+<script src="https://cdn.jsdelivr.net/npm/@vue/composition-api@1.0.5"></script>
 ```
 <!--cdn-links-end-->
 
diff --git a/README.zh-CN.md b/README.zh-CN.md
index 121f06da..a674dea8 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@1.0.4"></script>
+<script src="https://cdn.jsdelivr.net/npm/@vue/composition-api@1.0.5"></script>
 ```
 <!--cdn-links-end-->
 
diff --git a/package.json b/package.json
index a4c1ae27..fe176ee8 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@vue/composition-api",
-  "version": "1.0.4",
+  "version": "1.0.5",
   "description": "Provide logic composition capabilities for Vue.",
   "keywords": [
     "vue",