The changelog entry ending in a `.` or `!` is not optional (#14087)

1 files changed, 1 insertions, 1 deletions

diff --git a/docs/development/contributing_guide.md b/docs/development/contributing_guide.md

index 5c37225168..7f99220a3b 100644
--- a/docs/development/contributing_guide.md
+++ b/docs/development/contributing_guide.md
@@ -390,7 +390,7 @@ This file will become part of our [changelog](
 https://github.com/matrix-org/synapse/blob/master/CHANGES.md) at the next
 release, so the content of the file should be a short description of your
 change in the same style as the rest of the changelog. The file can contain Markdown
-formatting, and should end with a full stop (.) or an exclamation mark (!) for
+formatting, and must end with a full stop (.) or an exclamation mark (!) for
 consistency.
 
 Adding credits to the changelog is encouraged, we value your