diff --git a/readme.md b/readme.md
index a9ea26c..6c7371f 100644
--- a/readme.md
+++ b/readme.md
@@ -84,4 +84,5 @@ Treefile → apt-ostree → Container Image → Registry Upload → deb-bootc-im
 ## Distrobution build tools
 [debos](https://github.com/go-debos/debos) is a tool-chain for simplifying the
 process of building a Debian-based OS image.\
-[Fedora coreos-assembler](https://github.com/coreos/coreos-assembler) aka COSA
\ No newline at end of file
+[Fedora coreos-assembler](https://github.com/coreos/coreos-assembler) aka COSA
+[Boot Loader Specification (BLS)](https://uapi-group.org/specifications/specs/boot_loader_specification/)
\ No newline at end of file