diff --git a/README.md b/README.md
index 8da3f10..889f979 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,7 @@
+# WARNING: This repository is no longer maintained
+
+> This repository will not be updated. The repository will be kept available in read-only mode.
+
 *Read this in other languages: [中文](README-cn.md).*
 
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