diff --git a/README.md b/README.md
index c19b30a..69134c8 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@ pgAdmin for yunohost
 ====================
 
 [![Integration level](https://dash.yunohost.org/integration/pgadmin.svg)](https://dash.yunohost.org/appci/app/pgadmin) ![](https://ci-apps.yunohost.org/ci/badges/pgadmin.status.svg) ![](https://ci-apps.yunohost.org/ci/badges/pgadmin.maintain.svg)  
-[![Install pgadmin with YunoHost](https://install-app.yunohost.org/install-with-yunohost.png)](https://install-app.yunohost.org/?app=pgadmin)
+[![Install pgadmin with YunoHost](https://install-app.yunohost.org/install-with-yunohost.svg)](https://install-app.yunohost.org/?app=pgadmin)
 
 > *This package allow you to install pgadmin quickly and simply on a YunoHost server.  
 If you don't have YunoHost, please see [here](https://yunohost.org/#/install) to know how to install and enjoy it.*
@@ -12,7 +12,7 @@ Overview
 
 pgAdmin is a feature rich Open Source administration and development platform for PostgreSQL.
 
-**Shipped version:** 4-4.28
+**Shipped version:** 4-5.1
 
 Screenshots
 -----------
diff --git a/conf/armv7_stretch.src b/conf/armv7_bullseye.src
similarity index 71%
rename from conf/armv7_stretch.src
rename to conf/armv7_bullseye.src
index 5fc1e3d..2943e78 100644
--- a/conf/armv7_stretch.src
+++ b/conf/armv7_bullseye.src
@@ -1,5 +1,5 @@
-SOURCE_URL=https://github.com/Josue-T/pgadmin_python_build/releases/download/v4-4.28/pgadmin_4-4.28-stretch-bin1_armv7l.tar.gz
-SOURCE_SUM=f9c786137c9f401e20f738737c12c02ae4f8d645b80544c78752ecba1a5f280d
+SOURCE_URL=https://github.com/Josue-T/pgadmin_python_build/releases/download/v4-4.30/pgadmin_4-4.30-stretch-bin1_armv7l.tar.gz
+SOURCE_SUM=17502fa77ba894d9c2d4b061485c30634f74dfd03031816af3b215feeec5cc45
 # (Optional) Program to check the integrity (sha256sum, md5sum...)
 # default: sha256
 SOURCE_SUM_PRG=sha256sum
diff --git a/conf/armv7_buster.src b/conf/armv7_buster.src
index b58682b..3cc7195 100644
--- a/conf/armv7_buster.src
+++ b/conf/armv7_buster.src
@@ -1,5 +1,5 @@
-SOURCE_URL=https://github.com/Josue-T/pgadmin_python_build/releases/download/v4-4.28/pgadmin_4-4.28-buster-bin1_armv7l.tar.gz
-SOURCE_SUM=631919aadf076649365df7040c0b51fb5c8aaf45c9770613a38ccb392caea39a
+SOURCE_URL=https://github.com/Josue-T/pgadmin_python_build/releases/download/v4-5.1/pgadmin_4-5.1-buster-bin1_armv7l.tar.gz
+SOURCE_SUM=5fac31d2593a18d5c41448d312e5e8b7d127668bd6b4bd1ccfcd02411925b0db
 # (Optional) Program to check the integrity (sha256sum, md5sum...)
 # default: sha256
 SOURCE_SUM_PRG=sha256sum
diff --git a/manifest.json b/manifest.json
index 0efa007..1729d82 100644
--- a/manifest.json
+++ b/manifest.json
@@ -6,7 +6,7 @@
         "en": "Manage PostgreSQL databases over the web",
         "fr": "Application web de gestion des bases de données PostgreSQL"
     },
-    "version": "4-4.28~ynh1",
+    "version": "4-5.1~ynh1",
     "url": "https://www.pgadmin.org",
     "license": "PostgreSQL",
     "maintainer": {
@@ -14,7 +14,7 @@
         "email": "josue@tille.ch"
     },
     "requirements": {
-        "yunohost": ">= 3.8.0.0"
+        "yunohost": ">= 4.0.0.0"
     },
     "multi_instance": false,
     "services": [
diff --git a/scripts/_common.sh b/scripts/_common.sh
index 59afd95..67989ea 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -6,7 +6,7 @@ app=$YNH_APP_INSTANCE_NAME
 final_path=/opt/yunohost/$app
 pgadmin_user="$app"
 python_version="$(python3 -V | cut -d' ' -f2 | cut -d. -f1-2)"
-dependances="python3-pip build-essential python3-dev python3-venv postgresql uwsgi uwsgi-plugin-python3 expect libpq-dev"
+dependances="python3-pip build-essential python3-dev python3-venv postgresql uwsgi uwsgi-plugin-python3 expect libpq-dev libkrb5-dev"
 
 #=================================================
 # DEFINE ALL COMMON FONCTIONS
@@ -22,10 +22,16 @@ setup_dir() {
 install_source() {
     # Clean venv is it was on python with an old version in case major upgrade of debian
     if [ ! -e $final_path/lib/python$python_version ]; then
-        ynh_secure_remove --file=$final_path
+        ynh_secure_remove --file=$final_path/bin
+        ynh_secure_remove --file=$final_path/lib
+        ynh_secure_remove --file=$final_path/lib64
+        ynh_secure_remove --file=$final_path/include
+        ynh_secure_remove --file=$final_path/share
+        ynh_secure_remove --file=$final_path/pyvenv.cfg
     fi
 
     mkdir -p $final_path
+    chown $pgadmin_user:root -R $final_path
 
     if [ -n "$(uname -m | grep arm)" ]
     then
@@ -36,19 +42,29 @@ install_source() {
         ynh_secure_remove --file=$final_path/share
         ynh_setup_source --dest_dir $final_path/ --source_id "armv7_$(lsb_release --codename --short)"
     else
+        # Install rustup is not already installed
+        # We need this to be able to install cryptgraphy
+        export PATH="$PATH:$final_path/.cargo/bin:$final_path/.local/bin:/usr/local/sbin"
+        if [ -e $final_path/.rustup ]; then
+            sudo -u "$pgadmin_user" env PATH=$PATH rustup update
+        else
+            sudo -u "$pgadmin_user" bash -c 'curl -sSf -L https://static.rust-lang.org/rustup.sh | sh -s -- -y --default-toolchain=stable --profile=minimal'
+        fi
+
 # 		Install virtualenv if it don't exist
         test -e $final_path/bin/python3 || python3 -m venv $final_path
 
 # 		Install pgadmin in virtualenv
-        set +u;
+        u_arg='u'
+        set +$u_arg;
         source $final_path/bin/activate
         set -u;
         pip3 install --upgrade pip
         pip3 install --upgrade 'Werkzeug<1.0'
         pip3 install --upgrade pgadmin$app_main_version==$app_sub_version
-        set +u;
+        set +$u_arg;
         deactivate
-        set -u;
+        set -$u_arg;
     fi
 }
 
diff --git a/scripts/backup b/scripts/backup
index 52ff421..0630790 100644
--- a/scripts/backup
+++ b/scripts/backup
@@ -15,7 +15,7 @@ source /usr/share/yunohost/helpers
 ynh_abort_if_errors
 
 # LOAD SETTINGS
-ynh_script_progression --message="Loading installation settings..."
+ynh_print_info --message="Loading installation settings..."
 final_path=$(ynh_app_setting_get --app $app --key final_path)
 domain=$(ynh_app_setting_get --app $app --key domain)
 db_name=$(ynh_app_setting_get --app $app --key db_name)
@@ -28,20 +28,20 @@ app_sub_version=$(echo $app_version | cut -d'-' -f2)
 #=================================================
 
 # BACKUP THE APP MAIN DIR
-ynh_script_progression --message="Backing up the main app directory..."
+ynh_print_info --message="Backing up the main app directory..."
 ynh_backup --src_path "$final_path"
 
 # Backup config
-ynh_script_progression --message="Backing configuration..."
+ynh_print_info --message="Backing configuration..."
 ynh_backup --src_path "/etc/nginx/conf.d/$domain.d/$app.conf"
 ynh_backup --src_path "/etc/uwsgi/apps-available/$app.ini"
 
 # Backup Data and LOG
-ynh_script_progression --message="Backing up data..."
+ynh_print_info --message="Backing up data..."
 ynh_backup --src_path "/var/lib/pgadmin"
-ynh_script_progression --message="Backing up log..."
+ynh_print_info --message="Backing up log..."
 ynh_backup --src_path "/var/log/pgadmin"
 ynh_backup --src_path "/var/log/uwsgi/$app"
 
-ynh_script_progression --message="Backup script completed for $app. (YunoHost will then actually copy those files to the archive)." --last
+ynh_print_info --message="Backup script completed for $app. (YunoHost will then actually copy those files to the archive)."
 
diff --git a/scripts/experimental_helper.sh b/scripts/experimental_helper.sh
index 3b75020..6b09bfc 100644
--- a/scripts/experimental_helper.sh
+++ b/scripts/experimental_helper.sh
@@ -128,6 +128,11 @@ ynh_remove_uwsgi_service () {
     fi
 }
 
+ynh_restore_uwsgi_service () {
+    ynh_check_global_uwsgi_config
+    systemctl enable "uwsgi-app@$app" --quiet
+    yunohost service add "uwsgi-app@$app" --log "/var/log/uwsgi/$app/$app.log"
+}
 
 #=================================================
 # OTHERS HELPERS
diff --git a/scripts/install b/scripts/install
index d9f0cc8..4254391 100644
--- a/scripts/install
+++ b/scripts/install
@@ -18,7 +18,7 @@ ynh_script_progression --message="Validating installation parameters..."
 
 # RETRIEVE ARGUMENTS FROM THE MANIFEST
 domain=$YNH_APP_ARG_DOMAIN
-path_url=$(ynh_normalize_url_path --path_url $YNH_APP_ARG_PATH)
+path_url=$YNH_APP_ARG_PATH
 admin=$YNH_APP_ARG_ADMIN
 db_user="pgadmin"
 admin_pwd=$YNH_APP_ARG_ADMIN_PASSWORD
@@ -63,7 +63,7 @@ ynh_install_app_dependencies $dependances
 
 # Create user
 ynh_script_progression --message="Configuring system user..."
-ynh_system_user_create --username $pgadmin_user --home_dir /var/lib/$app
+ynh_system_user_create --username $pgadmin_user --home_dir $final_path
 
 # Download, check integrity, uncompress and patch the source from app.src
 ynh_script_progression --message="Installing sources files..." --weight=10
diff --git a/scripts/restore b/scripts/restore
index d9621c6..ea2f953 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -37,7 +37,7 @@ ynh_install_app_dependencies $dependances
 
 # Create user
 ynh_script_progression --message="Recreating the dedicated system user..."
-ynh_system_user_create --username $pgadmin_user --home_dir /var/lib/$app
+ynh_system_user_create --username $pgadmin_user --home_dir $final_path
 
 # Restore all config and data
 ynh_script_progression --message="Restoring files..." --weight=5
@@ -55,8 +55,7 @@ ynh_psql_execute_as_root \
 
 # Restore systemd configuration
 ynh_script_progression --message="Reconfiguring application..."
-ynh_check_global_uwsgi_config
-systemctl enable "uwsgi-app@$app.service"
+ynh_restore_uwsgi_service
 
 #=================================================
 # GENERIC FINALIZATION
@@ -67,8 +66,8 @@ ynh_script_progression --message="Protecting directory..."
 set_permission
 
 # Restrict access to admin only
-ynh_script_progression --message="Configuring permissions..."
-yunohost app addaccess --users=$admin $app
+ynh_script_progression --message="Configuring permissions"
+ynh_permission_update --permission="main" --remove="all_users" --add=$admin
 
 # Configuration de logrotate
 ynh_script_progression --message="Configuring log rotation..."
diff --git a/scripts/upgrade b/scripts/upgrade
index 5013c0d..495b2d7 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -33,6 +33,10 @@ ynh_clean_setup () {
 test -e /etc/uwsgi/apps-available/$app.ini && \
     ynh_systemd_action --service_name "uwsgi-app@$app.service" --action stop
 
+if ! grep -q "$final_path" /etc/passwd; then
+    sed --in-place -r "s@$app\:x\:([[:digit:]]+\:[[:digit:]]+)\:\:/.*/$app\:/usr/sbin/nologin@$app\:x\:\1\:\:$final_path\:/usr/sbin/nologin@g" /etc/passwd
+fi
+
 #=================================================
 # STANDARD UPGRADE STEPS
 #=================================================