diff --git a/README.md b/README.md
index 97ee500..9f27d24 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 [![Install Flarum with YunoHost](https://install-app.yunohost.org/install-with-yunohost.png)](https://install-app.yunohost.org/?app=flarum)
 
-[![Integration level](https://ci-apps.yunohost.org/ci/logs/flarum%20%28Apps%29.svg)](https://dash.yunohost.org/appci/app/flarum) [![Flarum version](https://img.shields.io/badge/flarum-0.1.0--beta.11-green.svg)](https://github.com/flarum/flarum/releases/tag/v0.1.0-beta.11) ![PHP version](https://img.shields.io/badge/php-7.3-green.svg)
+[![Integration level](https://ci-apps.yunohost.org/ci/logs/flarum%20%28Apps%29.svg)](https://dash.yunohost.org/appci/app/flarum) [![Flarum version](https://img.shields.io/badge/flarum-0.1.0--beta.12-green.svg)](https://github.com/flarum/flarum/releases/tag/v0.1.0-beta.12) ![PHP version](https://img.shields.io/badge/php-7.3-green.svg)
 
 [Flarum](http://flarum.org/), an open-source forum software, packaged for [YunoHost](https://yunohost.org/), a self-hosting server operating server.
 
@@ -30,6 +30,21 @@ Required parameters are:
 
 After installation, simply open your browser to Flarum's page. First loading may be a bit longer as assets are generated.
 
+## Upgrading
+
+Note that all third-party extensions are removed upon upgrading.
+
+## Adding extensions after installation
+
+Replace `flarum` with your app ID in case of multiple installation.
+Replace `vendor/extension` with the appropriate names. Read the extension documentation if it requires additional steps.
+
+```bash
+app=flarum
+cd /var/www/$app
+sudo -u $app php7.3 composer.phar require vendor/extension
+```
+
 ## Troubleshooting
 
 ### `Low memory` errors
diff --git a/manifest.json b/manifest.json
index 5d719ac..ffe22c0 100644
--- a/manifest.json
+++ b/manifest.json
@@ -3,13 +3,13 @@
     "id": "flarum",
     "packaging_format": 1,
     "description": {
-        "en": "Flarum is the next-generation forum software that makes online discussion fun. It's simple, fast, and free.",
-        "fr": "Flarum est le forum de nouvelle génération qui rend les discussions ligne un plaisir. Il est simple, rapide, et libre.",
-        "de": "Flarum ist die Forensoftware der nächsten Generation, mit der Online-Diskussionen Spaß machen. Es ist einfach, schnell und freie."
+        "en": "Next-generation forum made simple.",
+        "fr": "Un forum de nouvelle génération, simplement.",
+        "de": "Forum der nächsten Generation leicht gemacht."
     },
     "url": "http://flarum.org/",
     "license": "MIT",
-    "version": "0.1.0-beta.11~ynh1",
+    "version": "0.1.0-beta.12~ynh1",
     "maintainer": {
         "name": "tituspijean",
         "email": "tituspijean@outlook.com"
diff --git a/scripts/_common.sh b/scripts/_common.sh
index 78d5654..9f9df4a 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -7,8 +7,8 @@ pkg_dependencies="php7.3-curl php7.3-dom php7.3-gd php7.3-json php7.3-mbstring p
 
 # Version numbers
 php_version="7.3"
-project_version="0.1.0-beta.11"
-core_version="0.1.0-beta.11"
+project_version="0.1.0-beta.12"
+core_version="0.1.0-beta.12"
 ssowat_version="0.1.0-beta.10-2"
 
 #=================================================