diff --git a/draft-ietf-core-oscore-id-update.md b/draft-ietf-core-oscore-id-update.md
index 666e152..78be56a 100644
--- a/draft-ietf-core-oscore-id-update.md
+++ b/draft-ietf-core-oscore-id-update.md
@@ -72,4 +72,4 @@ This document has no IANA actions.
 # Acknowledgments # {#acknowledgment}
 {:unnumbered}
 
-TODO acknowledge. 
+TODO acknowledge.