diff --git a/ChangeLog b/ChangeLog
index da33006..6731ccd 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2021-03-19  Tatsuya Kinoshita  <tats@debian.org>
+
+	* Str.c: Decrease STR_SIZE_MAX to prevent large memory usage.
+
 2021-03-14  Tatsuya Kinoshita  <tats@debian.org>
 
 	* fuzz/fuzz-conv.c: