diff --git a/README.md b/README.md
index 46e220d..d86ae41 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,4 @@
+![Master Branch Version](https://img.shields.io/badge/master-v4.0.0-9cf?style=flat-square)
 ![GitHub release (latest by date)](https://img.shields.io/github/v/release/k4yt3x/video2x?style=flat-square)
 ![GitHub All Releases](https://img.shields.io/github/downloads/k4yt3x/video2x/total?style=flat-square)
 ![GitHub](https://img.shields.io/github/license/k4yt3x/video2x?style=flat-square)