diff --git a/CHANGELOG.md b/CHANGELOG.md
index aef6cf95..67fcdd94 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,17 +1,13 @@
 CHANGELOG
 =========
 
-In Development
---------------
+Version 55 (October 18, 2021)
+-----------------------------
 
 Mail:
 
 * "SMTPUTF8" is now disabled in Postfix. Because Dovecot still does not support SMTPUTF8, incoming mail to internationalized addresses was bouncing. This fixes incoming mail to internationalized domains (which was probably working prior to v0.40), but it will prevent sending outbound mail to addresses with internationalized local-parts.
-* Upgraded to Roundcube 1.5 Release Candidate.
-
-Firewall:
-
-* Fail2ban's IPv6 support is enabled.
+* Upgraded to Roundcube 1.5.
 
 Control panel:
 
@@ -27,6 +23,7 @@ Control panel:
 
 Other:
 
+* Fail2ban's IPv6 support is enabled.
 * The mail log tool now doesn't crash if there are email addresess in log messages with invalid UTF-8 characters.
 * Additional nsd.conf files can be placed in /etc/nsd.conf.d.
 
diff --git a/management/templates/external-dns.html b/management/templates/external-dns.html
index 0634ec82..4532c3f5 100644
--- a/management/templates/external-dns.html
+++ b/management/templates/external-dns.html
@@ -38,7 +38,7 @@
 <p class="alert" role="alert">
 	<span class="glyphicon glyphicon-info-sign"></span>
 	You may encounter zone file errors when attempting to create a TXT record with a long string.
-	<a href="http://tools.ietf.org/html/rfc4408#section-3.1.3">RFC 4408</a> states a TXT record is allowed to contain multiple strings, and this technique can be used to construct records that would exceed the 255-byte maximum length.
+	<a href="https://tools.ietf.org/html/rfc4408#section-3.1.3">RFC 4408</a> states a TXT record is allowed to contain multiple strings, and this technique can be used to construct records that would exceed the 255-byte maximum length.
 	You may need to adopt this technique when adding DomainKeys. Use a tool like <code>named-checkzone</code> to validate your zone file.
 </p>
 
diff --git a/setup/bootstrap.sh b/setup/bootstrap.sh
index 915fd736..4de9463a 100644
--- a/setup/bootstrap.sh
+++ b/setup/bootstrap.sh
@@ -20,7 +20,7 @@ if [ -z "$TAG" ]; then
 	# want to display in status checks.
 	if [ "$(lsb_release -d | sed 's/.*:\s*//' | sed 's/18\.04\.[0-9]/18.04/' )" == "Ubuntu 18.04 LTS" ]; then
 		# This machine is running Ubuntu 18.04.
-		TAG=v0.54
+		TAG=v55
 
 	elif [ "$(lsb_release -d | sed 's/.*:\s*//' | sed 's/14\.04\.[0-9]/14.04/' )" == "Ubuntu 14.04 LTS" ]; then
 		# This machine is running Ubuntu 14.04.
diff --git a/setup/webmail.sh b/setup/webmail.sh
index c846ab51..596f90fc 100755
--- a/setup/webmail.sh
+++ b/setup/webmail.sh
@@ -30,8 +30,8 @@ apt_install \
 # Combine the Roundcube version number with the commit hash of plugins to track
 # whether we have the latest version of everything.
 
-VERSION=1.5-rc
-HASH=a7cb2a39702536d769c7ff93f716e27f0b93f9d9
+VERSION=1.5.0
+HASH=2a9d11d9c10c8e8756120606c47eef702f00fe6d
 PERSISTENT_LOGIN_VERSION=6b3fc450cae23ccb2f393d0ef67aa319e877e435 # version 5.2.0
 HTML5_NOTIFIER_VERSION=68d9ca194212e15b3c7225eb6085dbcf02fd13d7 # version 0.6.4+
 CARDDAV_VERSION=3.0.3