diff --git a/BACKERS.md b/BACKERS.md
index 547dfa0d..437fdf5a 100644
--- a/BACKERS.md
+++ b/BACKERS.md
@@ -29,7 +29,8 @@ The following features are currently available exclusively to sponsors. A tangib
  ✅ [Wireless LAN routing](https://docs.raspap.com/wlanrouting/)  
  ✅ Custom user avatars  
  ✅ [WiFi repeater mode](https://docs.raspap.com/ap-basics/#wifi-repeater-mode)  
- 
+ ✅ [Time synchronization](https://docs.raspap.com/time/)  
+
 Look for the list above to grow as we add more exclusive features. Be sure to visit this page from time to time to learn about what's new, check the [Insiders docs page](https://docs.raspap.com/insiders/) and follow [@RaspAP on Twitter](https://twitter.com/rasp_ap) to stay updated.
 
 ## Funding targets
diff --git a/README.md b/README.md
index b378d851..b411eca2 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 ![](https://i.imgur.com/xeKD93p.png)
-[![Release 3.1.4](https://img.shields.io/badge/release-v3.1.4-green)](https://github.com/raspap/raspap-webgui/releases) [![Awesome](https://awesome.re/badge.svg)](https://github.com/thibmaek/awesome-raspberry-pi) [![Join Insiders](https://img.shields.io/static/v1?label=Join%20Insiders&message=%E2%9D%A4&logo=GitHub&color=ff69b4)](https://github.com/sponsors/RaspAP) [![Build Status](https://app.travis-ci.com/RaspAP/raspap-webgui.svg?branch=master)](https://app.travis-ci.com/RaspAP/raspap-webgui) [![Crowdin](https://badges.crowdin.net/raspap/localized.svg)](https://crowdin.com/project/raspap) [![Twitter URL](https://img.shields.io/twitter/url?label=%40RaspAP&logoColor=%23d8224c&url=https%3A%2F%2Ftwitter.com%2Frasp_ap)](https://twitter.com/rasp_ap) [![Reddit](https://img.shields.io/badge/%2Fr%2FRaspAP-e05d44?style=flat&logo=Reddit&logoColor=white&labelColor=e05d44&color=b14835)](https://reddit.com/r/RaspAP) [![Discord](https://img.shields.io/discord/642436993451819018?color=7289DA&label=Discord&logo=discord&style=flat)](https://discord.gg/KVAsaAR)
+[![Release 3.1.5](https://img.shields.io/badge/release-v3.1.5-green)](https://github.com/raspap/raspap-webgui/releases) [![Awesome](https://awesome.re/badge.svg)](https://github.com/thibmaek/awesome-raspberry-pi) [![Join Insiders](https://img.shields.io/static/v1?label=Join%20Insiders&message=%E2%9D%A4&logo=GitHub&color=ff69b4)](https://github.com/sponsors/RaspAP) [![Build Status](https://app.travis-ci.com/RaspAP/raspap-webgui.svg?branch=master)](https://app.travis-ci.com/RaspAP/raspap-webgui) [![Crowdin](https://badges.crowdin.net/raspap/localized.svg)](https://crowdin.com/project/raspap) [![Twitter URL](https://img.shields.io/twitter/url?label=%40RaspAP&logoColor=%23d8224c&url=https%3A%2F%2Ftwitter.com%2Frasp_ap)](https://twitter.com/rasp_ap) [![Reddit](https://img.shields.io/badge/%2Fr%2FRaspAP-e05d44?style=flat&logo=Reddit&logoColor=white&labelColor=e05d44&color=b14835)](https://reddit.com/r/RaspAP) [![Discord](https://img.shields.io/discord/642436993451819018?color=7289DA&label=Discord&logo=discord&style=flat)](https://discord.gg/KVAsaAR)
 
 
 RaspAP is feature-rich wireless router software that _just works_ on many popular [Debian-based devices](#supported-operating-systems), including the Raspberry Pi. Our popular [Quick installer](#quick-installer) and [Docker container](#docker-support) create a known-good default configuration for all current Raspberry Pis with onboard wireless. A fully responsive, mobile-ready interface gives you control over the relevant services and networking options. Advanced DHCP settings, WireGuard and OpenVPN support, [SSL certificates](https://docs.raspap.com/ssl-quick/), security audits, [captive portal integration](https://docs.raspap.com/captive/), themes and [multilingual options](https://docs.raspap.com/translations/) are included.
diff --git a/includes/defaults.php b/includes/defaults.php
index 03d6704a..f35de22a 100755
--- a/includes/defaults.php
+++ b/includes/defaults.php
@@ -6,7 +6,7 @@ if (!defined('RASPI_CONFIG')) {
 
 $defaults = [
   'RASPI_BRAND_TEXT' => 'RaspAP',
-  'RASPI_VERSION' => '3.1.4',
+  'RASPI_VERSION' => '3.1.5',
   'RASPI_CONFIG_NETWORK' => RASPI_CONFIG.'/networking/defaults.json',
   'RASPI_CONFIG_PROVIDERS' => 'config/vpn-providers.json',
   'RASPI_CONFIG_API' => RASPI_CONFIG.'/api',
diff --git a/index.php b/index.php
index b0a94e5c..70cf81b6 100755
--- a/index.php
+++ b/index.php
@@ -14,7 +14,7 @@
  * @author  Lawrence Yau <sirlagz@gmail.com>
  * @author  Bill Zimmerman <billzimmerman@gmail.com>
  * @license GNU General Public License, version 3 (GPL-3.0)
- * @version 3.1.4
+ * @version 3.1.5
  * @link    https://github.com/RaspAP/raspap-webgui/
  * @link    https://raspap.com/
  * @see     http://sirlagz.net/2013/02/08/raspap-webgui/