diff --git a/Signatures.md b/Signatures.md
index 5afc02d..a28c5ee 100644
--- a/Signatures.md
+++ b/Signatures.md
@@ -1,7 +1,9 @@
-# WebAssembly module signatures
+# WebAssembly signatures
 
 This document describes a digital signature format specifically designed for WebAssembly modules.
 
+It also supports [WebAssembly components](https://github.com/WebAssembly/component-model). As with modules, everything in components, including nested components, are stored in sections, including custom sections. Consequently, everything in this document that refers to "modules" also applies to "components".
+
 It satisfies the following requirements:
 
 - It is possible to verify a module before execution.