diff --git a/VERSION b/VERSION
index ef9b4e2c..fb7a04cf 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-v0.4.0-dev
+v0.4.0
diff --git a/build/charts/antrea-ui/README.md b/build/charts/antrea-ui/README.md
index 8d348671..0dfc6f4f 100644
--- a/build/charts/antrea-ui/README.md
+++ b/build/charts/antrea-ui/README.md
@@ -1,6 +1,6 @@
 # antrea-ui
 
-![Version: 0.4.0-dev](https://img.shields.io/badge/Version-0.4.0--dev-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: latest](https://img.shields.io/badge/AppVersion-latest-informational?style=flat-square)
+![Version: 0.4.0](https://img.shields.io/badge/Version-0.4.0-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: latest](https://img.shields.io/badge/AppVersion-latest-informational?style=flat-square)
 
 Web UI for the Antrea Kubernetes network plugin