diff --git a/README.md b/README.md
index c9f89d2..f29fcfd 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,7 @@ If you don't have YunoHost, please consult [the guide](https://yunohost.org/#/in
 
 Home automation platform
 
-**Shipped version:** 2021.11.5~ynh1
+**Shipped version:** 2021.12.7~ynh1
 
 **Demo:** https://demo.home-assistant.io
 
diff --git a/README_fr.md b/README_fr.md
index d7cadca..d45b45a 100644
--- a/README_fr.md
+++ b/README_fr.md
@@ -13,7 +13,7 @@ Si vous n'avez pas YunoHost, regardez [ici](https://yunohost.org/#/install) pour
 
 Plateforme domotique
 
-**Version incluse :** 2021.11.5~ynh1
+**Version incluse :** 2021.12.7~ynh1
 
 **Démo :** https://demo.home-assistant.io
 
diff --git a/manifest.json b/manifest.json
index 05b2755..1918ef9 100644
--- a/manifest.json
+++ b/manifest.json
@@ -6,7 +6,7 @@
     "en": "Home automation platform",
     "fr": "Plateforme domotique"
   },
-  "version": "2021.11.5~ynh1",
+  "version": "2021.12.7~ynh1",
   "url": "https://github.com/home-assistant/home-assistant",
   "upstream": {
     "license": "Apache-2.0",
diff --git a/scripts/_common.sh b/scripts/_common.sh
index 98af024..0bfac6b 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -3,7 +3,7 @@
 #
 
 # Release to install
-VERSION=2021.11.5
+VERSION=2021.12.7
 
 # Package dependencies
 PKG_DEPENDENCIES="python3 python3-dev python3-venv python3-pip libffi-dev libssl-dev libjpeg-dev zlib1g-dev autoconf build-essential libopenjp2-7 libtiff5"
@@ -13,6 +13,9 @@ PKG_DEPENDENCIES="python3 python3-dev python3-venv python3-pip libffi-dev libssl
 # Pyhton 3.9.2 will be shiped with bullseye
 PY_REQUIRED_VERSION=3.9.2
 
+# System groups allowed to homeassistant user
+USER_GROUPS="dialout gpio i2c"
+
 # Check if directory/file already exists (path in argument)
 myynh_check_path () {
 	[ -z "$1" ] && ynh_die "No argument supplied"
diff --git a/scripts/install b/scripts/install
index 2321a9e..6778034 100644
--- a/scripts/install
+++ b/scripts/install
@@ -41,7 +41,7 @@ ynh_app_setting_set --app="$app" --key=path_url --value="$path_url"
 
 # create a dedicated system user
 ynh_script_progression --message="Creating dedicated user, rights and folders..."
-ynh_system_user_create --username="$app"
+ynh_system_user_create --username="$app" --groups="$USER_GROUPS"
 
 # create a directory for the installation of Home Assistant
 myynh_create_dir "$final_path"
diff --git a/scripts/restore b/scripts/restore
index b6dd55c..1a4a152 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -34,7 +34,7 @@ ynh_exec_warn_less yunohost firewall allow TCP $port
 
 # restore dedicated system user
 ynh_script_progression --message="Restoring dedicated user and rights folders..."
-ynh_system_user_create --username="$app"
+ynh_system_user_create --username="$app" --groups="$USER_GROUPS"
 ynh_restore_file --origin_path="/etc/sudoers.d/$app"
 
 # restore source