diff --git a/docs/protocol.md b/docs/protocol.md
index d16fff9e..89a00eb1 100644
--- a/docs/protocol.md
+++ b/docs/protocol.md
@@ -283,4 +283,4 @@ Document `Signify-Resource` and `Signify-Timestamp` headers here.
 Document the `Signature-Input` header here with link to https://httpwg.org/http-extensions/draft-ietf-httpbis-message-signatures.html
 
 ### Signature Header
-Docuemnt the signing method and `Signature` header.
+Document the signing method and `Signature` header.