diff --git a/package.json b/package.json
index 0989f64e9..1f3b84d8c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "vant",
-  "version": "0.7.9",
+  "version": "0.7.10",
   "description": "有赞vue wap组件库",
   "main": "lib/vant.js",
   "style": "lib/vant-css/index.css",
diff --git a/packages/dialog/src/dialog.vue b/packages/dialog/src/dialog.vue
index 35e21af78..c36233f79 100644
--- a/packages/dialog/src/dialog.vue
+++ b/packages/dialog/src/dialog.vue
@@ -35,6 +35,10 @@ export default {
     },
     lockOnScroll: {
       default: true
+    },
+    zIndex: {
+      type: [String, Number],
+      default: 2500
     }
   },
 
diff --git a/packages/vant-css/package.json b/packages/vant-css/package.json
index ac56dc9ea..983538af0 100644
--- a/packages/vant-css/package.json
+++ b/packages/vant-css/package.json
@@ -1,6 +1,6 @@
 {
   "name": "vant-css",
-  "version": "0.7.9",
+  "version": "0.7.10",
   "description": "vant css.",
   "main": "lib/index.css",
   "style": "lib/index.css",