diff --git a/stubs/binaryornot/METADATA.toml b/stubs/binaryornot/METADATA.toml
index bc45896c1a04..e177662d807d 100644
--- a/stubs/binaryornot/METADATA.toml
+++ b/stubs/binaryornot/METADATA.toml
@@ -1,2 +1,3 @@
 version = "0.4.*"
 upstream_repository = "https://github.com/binaryornot/binaryornot"
+obsolete_since = "0.5.0" # Released on 2026-03-07