diff --git a/changelog.md b/changelog.md
index 6d5de00..24ae678 100644
--- a/changelog.md
+++ b/changelog.md
@@ -10,7 +10,7 @@ Since [ECharts](https://echarts.apache.org/) is the main dependency of this
 application, major version changes in ECharts will also trigger a major version
 change in this application.
 
-## Version 4.0.0-pre (2022-09-??)
+## Version 4.0.0 (2022-09-21)
 
 * __[breaking change]__
 __Support for Node.js 8, Node.js 9, Node.js 10, and Node.js 11 is dropped.__
diff --git a/export-server/package-lock.json b/export-server/package-lock.json
index 4186350..b696fcb 100644
--- a/export-server/package-lock.json
+++ b/export-server/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "echarts-node-export-server",
-  "version": "4.0.0-pre",
+  "version": "4.0.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/export-server/package.json b/export-server/package.json
index c2f3c3c..7333425 100644
--- a/export-server/package.json
+++ b/export-server/package.json
@@ -1,6 +1,6 @@
 {
   "name": "echarts-node-export-server",
-  "version": "4.0.0-pre",
+  "version": "4.0.0",
   "description": "ECharts Node.js export server",
   "repository": {
     "url": "https://gitlab.com/striezel/echarts-node-export-server.git",