diff --git a/README.md b/README.md
index b788b45..cbc41e9 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ If you don't have YunoHost, please consult [the guide](https://yunohost.org/#/in
 ## Overview
 LXD is a next generation system container manager. It offers a user experience similar to virtual machines but using Linux containers instead.
 
-**Shipped version:** 4.11
+**Shipped version:** 4.12
 
 ## Demo
 
diff --git a/check_process b/check_process
index 29c19e5..5fe45d5 100644
--- a/check_process
+++ b/check_process
@@ -4,6 +4,7 @@
 		pkg_linter=1
 		setup_nourl=1
 		upgrade=1
+		upgrade=1 from_commit=cb39602175d6fe3f13335c33c6c9276f7aa980a2
 		backup_restore=1
 ;;; Options
 Email=
diff --git a/conf/lxd.src b/conf/lxd.src
index 72873f7..713de01 100644
--- a/conf/lxd.src
+++ b/conf/lxd.src
@@ -1,5 +1,5 @@
-SOURCE_URL=https://github.com/lxc/lxd/releases/download/lxd-4.11/lxd-4.11.tar.gz
-SOURCE_SUM=3d70bb0a07b6b343b1ff4b06f62d11147d205b30a808abc13978ea18ebed8fdd
+SOURCE_URL=https://github.com/lxc/lxd/releases/download/lxd-4.12/lxd-4.12.tar.gz
+SOURCE_SUM=3c5b87eb20e49f11084afb29224b6bad7a69bbdd8eaa99941c106149234bf1e1
 SOURCE_SUM_PRG=sha256sum
 SOURCE_FORMAT=tar.gz
 SOURCE_IN_SUBDIR=true
diff --git a/conf/systemd.service b/conf/systemd.service
index ab90e7b..e0c7130 100644
--- a/conf/systemd.service
+++ b/conf/systemd.service
@@ -9,6 +9,8 @@ Environment=LXD_OVMF_PATH=/usr/share/ovmf/x64
 ExecStart=/usr/local/bin/__APP__ --group=__APP__ --logfile=/var/log/__APP__/__APP__.log
 ExecStartPost=/usr/local/bin/__APP__ waitready --timeout=600
 ExecStop=/usr/local/bin/__APP__ shutdown
+User=root
+Group=root
 TimeoutStartSec=600s
 TimeoutStopSec=30s
 Restart=on-failure
diff --git a/manifest.json b/manifest.json
index 2000228..e260224 100644
--- a/manifest.json
+++ b/manifest.json
@@ -5,7 +5,7 @@
     "description": {
         "en": "Offers a user experience similar to virtual machines but using Linux containers instead."
     },
-    "version": "4.11~ynh1",
+    "version": "4.12~ynh1",
     "url": "https://example.com",
     "license": "Apache-2.0",
     "maintainer": {
diff --git a/scripts/backup b/scripts/backup
index b6ff79f..3328385 100755
--- a/scripts/backup
+++ b/scripts/backup
@@ -54,6 +54,7 @@ ynh_backup --src_path="/usr/local/bin/lxc"
 ynh_backup --src_path="/usr/local/bin/lxd"
 ynh_backup --src_path="/usr/local/bin/lxc-to-lxd"
 ynh_backup --src_path="/usr/local/bin/lxd-p2c"
+ynh_backup --src_path="/etc/bash_completion.d/lxd-client"
 
 ynh_backup --src_path="/etc/dnsmasq.d/lxd"
 
diff --git a/scripts/install b/scripts/install
index 382c547..22fc194 100755
--- a/scripts/install
+++ b/scripts/install
@@ -86,6 +86,7 @@ mkdir -p /usr/local/lib/$app
 mkdir -p /var/log/$app
 cp -a ${GOPATH}/deps/{raft,dqlite}/.libs/lib*.so* /usr/local/lib/$app/
 cp ${GOPATH}/bin/{lxc,lxd,lxc-to-lxd,lxd-p2c} /usr/local/bin
+cp ${lxd_tmp}/scripts/bash/lxd-client /etc/bash_completion.d/
 popd
 
 ynh_secure_remove --file="$go_tmp"
@@ -126,7 +127,8 @@ ynh_store_file_checksum --file="/etc/ld.so.conf.d/$app.conf"
 
 ldconfig
 
-echo "root:1000000:65536 # Added by lxd#" | tee -a /etc/subuid /etc/subgid
+echo "# Added by lxd
+root:100000:65536" | tee -a /etc/subuid /etc/subgid
 
 #=================================================
 # GENERIC FINALIZATION
diff --git a/scripts/remove b/scripts/remove
index 984298f..8a814d4 100755
--- a/scripts/remove
+++ b/scripts/remove
@@ -76,8 +76,9 @@ ynh_secure_remove --file="/usr/local/bin/lxc"
 ynh_secure_remove --file="/usr/local/bin/lxd"
 ynh_secure_remove --file="/usr/local/bin/lxc-to-lxd"
 ynh_secure_remove --file="/usr/local/bin/lxd-p2c"
+ynh_secure_remove --file="/etc/bash_completion.d/lxd-client"
 
-sed -i "/root:1000000:65536 # Added by lxd#/d" /etc/sub{uid,gid}
+sed -i "/# Added by lxd$/{N;/root:100000:65536/d}" /etc/sub{u,g}id
 
 #=================================================
 # GENERIC FINALIZATION
@@ -93,7 +94,7 @@ ynh_system_user_delete --username=$app
 # INFO TO REMOVE CONTAINERS
 #=================================================
 
-ynh_print_warn --message="If you really want to delete all containers and files related to lxd please run \"sudo rm /var/lib/lxd -rf\""
+ynh_print_warn --message="If you really want to delete all containers and files related to lxd please run \"rm /var/lib/lxd -rf\""
 
 #=================================================
 # END OF SCRIPT
diff --git a/scripts/restore b/scripts/restore
index a060a33..aea4fbd 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -83,6 +83,7 @@ ynh_restore_file --origin_path="/usr/local/bin/lxc"
 ynh_restore_file --origin_path="/usr/local/bin/lxd"
 ynh_restore_file --origin_path="/usr/local/bin/lxc-to-lxd"
 ynh_restore_file --origin_path="/usr/local/bin/lxd-p2c"
+ynh_restore_file --origin_path="/etc/bash_completion.d/lxd-client"
 
 ynh_restore_file --origin_path="/etc/dnsmasq.d/lxd"
 
@@ -92,7 +93,8 @@ ynh_restore_file --origin_path="/etc/ld.so.conf.d/$app.conf"
 
 ldconfig
 
-echo "root:1000000:65536 # Added by lxd#" | tee -a /etc/subuid /etc/subgid
+echo "# Added by lxd
+root:100000:65536" | tee -a /etc/subuid /etc/subgid
 
 #=================================================
 # START SYSTEMD SERVICE
diff --git a/scripts/upgrade b/scripts/upgrade
index e5b4646..5c9680d 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -21,6 +21,8 @@ app=$YNH_APP_INSTANCE_NAME
 #=================================================
 ynh_script_progression --message="Ensuring downward compatibility..."
 
+sed -i "/root:1000000:65536 # Added by lxd#/d" /etc/sub{u,g}id
+
 #=================================================
 # BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
 #=================================================
@@ -92,6 +94,7 @@ mkdir -p /usr/local/lib/$app
 mkdir -p /var/log/$app
 cp -a ${GOPATH}/deps/{raft,dqlite}/.libs/lib*.so* /usr/local/lib/$app/
 cp ${GOPATH}/bin/{lxc,lxd,lxc-to-lxd,lxd-p2c} /usr/local/bin
+cp ${lxd_tmp}/scripts/bash/lxd-client /etc/bash_completion.d/
 popd
 
 ynh_secure_remove --file="$go_tmp"
@@ -136,7 +139,8 @@ ynh_store_file_checksum --file="/etc/ld.so.conf.d/$app.conf"
 
 ldconfig
 
-echo "root:1000000:65536 # Added by lxd#" | tee -a /etc/subuid /etc/subgid
+echo "# Added by lxd
+root:100000:65536" | tee -a /etc/subuid /etc/subgid
 
 #=================================================
 # GENERIC FINALIZATION