diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3080b4a4..553a1295 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,14 @@
+<a name="3.3.1"></a>
+## [3.3.1](https://github.com/mengxiong10/vue2-datepicker/compare/v3.3.0...v3.3.1) (2020-02-18)
+
+
+### Bug Fixes
+
+* adjust zIndex of popup ([#412](https://github.com/mengxiong10/vue2-datepicker/issues/412)) ([513d10a](https://github.com/mengxiong10/vue2-datepicker/commit/513d10a))
+* change  z-index to style variable ([#412](https://github.com/mengxiong10/vue2-datepicker/issues/412)) ([82080aa](https://github.com/mengxiong10/vue2-datepicker/commit/82080aa))
+
+
+
 <a name="3.3.0"></a>
 # [3.3.0](https://github.com/mengxiong10/vue2-datepicker/compare/v3.2.2...v3.3.0) (2019-12-19)
 
diff --git a/package-lock.json b/package-lock.json
index 3437b01e..68726e93 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "vue2-datepicker",
-  "version": "3.3.0",
+  "version": "3.3.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 09b416fb..96d35179 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,7 @@
     "/index.*",
     "/scss"
   ],
-  "version": "3.3.0",
+  "version": "3.3.1",
   "scripts": {
     "dev": "parcel ./example/dev.html --open --port 2235",
     "build:index": "cross-env NODE_ENV=production rollup -c",