diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6b0172d..3027b93 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+<a name="1.0.5"></a>
+## [1.0.5](https://github.com/dreambo8563/vue-simple-drawer/compare/v1.0.4...v1.0.5) (2019-04-19)
+
+
+
 <a name="1.0.4"></a>
 ## [1.0.4](https://github.com/dreambo8563/vue-simple-drawer/compare/v1.0.2...v1.0.4) (2019-04-19)
 
diff --git a/Makefile b/Makefile
index 49851e9..24144e8 100644
--- a/Makefile
+++ b/Makefile
@@ -4,7 +4,7 @@ local:
 	npm run serve
 build:
 	npm run build
-doc:
+docs:
 	npm run pages
 report:
 	npm run report
\ No newline at end of file
diff --git a/README.md b/README.md
index 90f5a18..c85263c 100644
--- a/README.md
+++ b/README.md
@@ -56,12 +56,13 @@ export default {
 
 ### Prop Types
 
-| Property     | Type    | Required? | Description                                                                           |
-| :----------- | :------ | :-------- | :------------------------------------------------------------------------------------ |
-| align        | String  |           | One of "left", "up", "right", "down", default is 'right'. the location of the drawer. |
-| closeable    | Boolean |           | show the x - close button, default true                                               |
-| mask         | Boolean |           | show the mask layer - close button, default true                                      |
-| maskClosable | Boolean |           | emit 'close' event when click on mask layer, default: false                           |
+| Property     | Type    | Required? | Description                                                                                              |
+| :----------- | :------ | :-------- | :------------------------------------------------------------------------------------------------------- |
+| align        | String  |           | One of "left", "up", "right", "down", default is 'right'. the location of the drawer.                    |
+| closeable    | Boolean |           | show the x - close button, default true                                                                  |
+| mask         | Boolean |           | show the mask layer - close button, default true                                                         |
+| maskClosable | Boolean |           | emit 'close' event when click on mask layer, default: false                                              |
+| zIndex       | Number  |           | z-index value for the drawer, the nest drawer's z-index will be increased automatically, default is 1000 |
 
 ### Events
 
diff --git a/package-lock.json b/package-lock.json
index 196cf79..bed78ca 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "vue-simple-drawer",
-  "version": "1.0.4",
+  "version": "1.0.5",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index dcb5b37..92db894 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "vue-simple-drawer",
-  "version": "1.0.4",
+  "version": "1.0.5",
   "author": "dreambo8563",
   "main": "dist/vue-simple-drawer.umd.min.js",
   "private": false,
diff --git a/src/App.vue b/src/App.vue
index f178e22..80cbf97 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -25,7 +25,7 @@
     <button @click="toggle">Open/Close</button>
     <Drawer
       :maskClosable="true"
-      :index="1002"
+      :zIndex="1002"
       @close="toggle"
       :align="align"
       :closeable="true"
diff --git a/src/index.vue b/src/index.vue
index b0cd63e..acb5d42 100644
--- a/src/index.vue
+++ b/src/index.vue
@@ -51,7 +51,7 @@ export default {
       type: Boolean,
       default: false
     },
-    index: {
+    zIndex: {
       type: Number,
       default() {
         return this.simpleDrawerIndex;
@@ -60,7 +60,7 @@ export default {
   },
   provide() {
     return {
-      simpleDrawerIndex: this.zIndex + 1
+      simpleDrawerIndex: this.computedIndex + 1
     };
   },
   inject: {
@@ -78,7 +78,7 @@ export default {
     },
     indexCls(offset = 0) {
       return {
-        zIndex: this.zIndex + offset
+        zIndex: this.computedIndex + offset
       };
     }
   },
@@ -92,8 +92,8 @@ export default {
     alighCloseCls() {
       return `close-${this.align.toLowerCase()}`;
     },
-    zIndex() {
-      return this.index || this.simpleDrawerIndex;
+    computedIndex() {
+      return this.zIndex || this.simpleDrawerIndex;
     }
   }
 };