diff --git a/zip-0000.rst b/zip-0000.rst
index 3ac67f1f..5e1596a5 100644
--- a/zip-0000.rst
+++ b/zip-0000.rst
@@ -469,8 +469,8 @@ The following additional header fields are OPTIONAL for ZIPs::
   Original-Authors:
   Discussions-To:
   Pull-Request:
-  Obsoleted by:
-  Updated by:
+  Obsoleted-By:
+  Updated-By:
   Obsoletes:
   Updates:
 
@@ -639,7 +639,7 @@ When an Active or Final ZIP is no longer relevant, its status SHOULD be
 changed to Obsolete. This change MUST also be objectively verifiable
 and/or discussed. Final ZIPs MAY be updated; the specification is still
 in force but modified by another specified ZIP or ZIPs (check the
-optional Updated-by header).
+optional Updated-By header).
 
 
 ZIP Comments