diff --git a/www/pages/download.md b/www/pages/download.md
index 2a9b54e0..2aceb0a5 100644
--- a/www/pages/download.md
+++ b/www/pages/download.md
@@ -11,7 +11,7 @@
 
 # Source
 
-* [mosquitto-1.5.4.tar.gz](https://mosquitto.org/files/source/mosquitto-1.5.4.tar.gz) (319kB) ([GPG signature](https://mosquitto.org/files/source/mosquitto-1.5.4.tar.gz.asc))
+* [mosquitto-1.5.5.tar.gz](https://mosquitto.org/files/source/mosquitto-1.5.5.tar.gz) (319kB) ([GPG signature](https://mosquitto.org/files/source/mosquitto-1.5.5.tar.gz.asc))
 * [mosquitto-1.5.4.tar.gz](https://www.eclipse.org/downloads/download.php?file=/mosquitto/source/mosquitto-1.5.4.tar.gz) (via Eclipse)
 * [Git source code repository](https://github.com/eclipse/mosquitto) (github.com)
 
diff --git a/www/pages/security.md b/www/pages/security.md
index 7696dca9..43618a25 100644
--- a/www/pages/security.md
+++ b/www/pages/security.md
@@ -19,6 +19,8 @@ follow the steps on [Eclipse Security] page to report it.
 Listed with most recent first. Further information on security related issues
 can be found in the [security category].
 
+* December 2018: No CVE assigned. Affecting versions **1.5** to **1.5.4**
+  inclusive, fixed in **1.5.5.**. More details at [version-155-released].
 * November 2018: No CVE assigned. Affecting versions **1.4** to **1.5.3**
   inclusive, fixed in **1.5.4**. More details at [version-154-released].
 * September 2018: [CVE-2018-12543] affecting versions **1.5** to **1.5.2**
@@ -43,6 +45,7 @@ can be found in the [security category].
   inclusive, fixed in **1.4.12**. More details at
   [security-advisory-cve-2017-7650].
 
+[version-155-released]: /2018/11/version-155-released/
 [version-154-released]: /2018/11/version-154-released/
 [security-advisory-cve-2018-12543]: /2018/09/security-advisory-cve-2018-12543/
 [security-advisory-cve-2017-7651-cve-2017-7652]: /2018/02/security-advisory-cve-2017-7651-cve-2017-7652/
diff --git a/www/posts/2018/12/version-155-released.md b/www/posts/2018/12/version-155-released.md
new file mode 100644
index 00000000..ca011715
--- /dev/null
+++ b/www/posts/2018/12/version-155-released.md
@@ -0,0 +1,60 @@
+<!--
+.. title: Version 1.5.5 released
+.. slug: version-155-released
+.. date: 2018-12-11 15:57:18 UTC+00:00
+.. tags: Releases
+.. category: 
+.. link: 
+.. description: 
+.. type: text
+-->
+
+This is a bugfix and security release.
+
+# Version 1.5.5 changes
+
+## Security
+- If `per_listener_settings` is set to true, then the `acl_file` setting was
+  ignored for the "default listener" only. This has been fixed. This does not
+  affect any listeners defined with the `listener` option. Closes [#1073].
+
+## Broker
+- Add `socket_domain` option to allow listeners to disable IPv6 support.
+  This is required to work around a problem in libwebsockets that means
+  sockets only listen on IPv6 by default if IPv6 support is compiled in.
+  Closes [#1004].
+- When using ADNS, don't ask for all network protocols when connecting,
+  because this can lead to confusing "Protocol not supported" errors if the
+  network is down. Closes [#1062].
+- Fix outgoing retained messages not being sent by bridges on initial
+  connection. Closes [#1040].
+- Don't reload `auth_opt_` options on reload, to match the behaviour of the
+  other plugin options. Closes [#1068].
+- Print message on error when installing/uninstalling as a Windows service.
+- All non-error connect/disconnect messages are controlled by the
+  `connection_messages` option. Closes [#772]. Closes [#613]. Closes [#537].
+
+## Library
+- Fix reconnect delay backoff behaviour. Closes [#1027].
+- Don't call `on_disconnect()` twice if keepalive tests fail. Closes [#1067].
+
+## Client
+- Always print leading zeros in `mosquitto_sub` when output format is hex.
+  Closes [#1066].
+
+## Build
+- Fix building where TLS-PSK is not available. Closes [#68].
+
+
+[#68]: https://github.com/eclipse/mosquitto/issues/68
+[#537]: https://github.com/eclipse/mosquitto/issues/537
+[#613]: https://github.com/eclipse/mosquitto/issues/613
+[#772]: https://github.com/eclipse/mosquitto/issues/772
+[#1004]: https://github.com/eclipse/mosquitto/issues/1004
+[#1027]: https://github.com/eclipse/mosquitto/issues/1027
+[#1040]: https://github.com/eclipse/mosquitto/issues/1040
+[#1062]: https://github.com/eclipse/mosquitto/issues/1062
+[#1066]: https://github.com/eclipse/mosquitto/issues/1066
+[#1067]: https://github.com/eclipse/mosquitto/issues/1067
+[#1068]: https://github.com/eclipse/mosquitto/issues/1068
+[#1073]: https://github.com/eclipse/mosquitto/issues/1073