diff --git a/README.md b/README.md
index 80b4321b7..6bdb63ea4 100644
--- a/README.md
+++ b/README.md
@@ -197,3 +197,9 @@ The last commit message can be checked with
 ```shell
 npm run commitlint:last-commit
 ``` 
+
+To check commit messages of a branch to the commit where it branches off from `main`, run
+
+```shell
+npm run commitlint:merge-base
+```