diff --git a/README.md b/README.md
index a777278..d744cf0 100644
--- a/README.md
+++ b/README.md
@@ -13,6 +13,14 @@ Usage:
     prefix = ''
 ```
 
+## Signed
+
+legacy format
+
+```console
+minisign -S -l -m extra-resolvers.md
+```
+
 ### License
 
 This work is licensed under the [GNU GPLv3+](LICENSE)