diff --git a/CHANGELOG.md b/CHANGELOG.md
index b844626f..d41cb25b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,16 @@
 CHANGELOG
 =========
 
+Version 64 (September 2, 2023)
+------------------------------
+
+* Fixed broken installation when upgrading from Mail-in-a-Box version 56 (Nextcloud 22) and earlier because of an upstream packaging issue.
+* Fixed backups to work with the latest duplicity package which was not backwards compatible.
+* Fixed setting B2 as a backup target with a slash in the application key.
+* Turned off OpenDMARC diagnostic reports sent in response to incoming mail.
+* Fixed some crashes when using an unrelased version of Mail-in-a-Box.
+* Added z-push administration scripts.
+
 Version 63 (July 27, 2023)
 --------------------------
 
diff --git a/setup/bootstrap.sh b/setup/bootstrap.sh
index b6261178..e6033fce 100644
--- a/setup/bootstrap.sh
+++ b/setup/bootstrap.sh
@@ -51,7 +51,7 @@ if [ -z "$TAG" ]; then
 	if [ "$UBUNTU_VERSION" == "Ubuntu 22.04 LTS" ]; then
 		# This machine is running Ubuntu 22.04, which is supported by
 		# Mail-in-a-Box versions 60 and later.
-		TAG=v63
+		TAG=v64
 	elif [ "$UBUNTU_VERSION" == "Ubuntu 18.04 LTS" ]; then
 		# This machine is running Ubuntu 18.04, which is supported by
 		# Mail-in-a-Box versions 0.40 through 5x.