diff --git a/scripts/_common.sh b/scripts/_common.sh
index 1596010..c763bbb 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -8,11 +8,14 @@ YNH_PHP_VERSION=7.4
 
 extra_php_dependencies="php${YNH_PHP_VERSION}-xml php${YNH_PHP_VERSION}-imagick php${YNH_PHP_VERSION}-bcmath php${YNH_PHP_VERSION}-exif php${YNH_PHP_VERSION}-mbstring php${YNH_PHP_VERSION}-gd php${YNH_PHP_VERSION}-mysqli php${YNH_PHP_VERSION}-json php${YNH_PHP_VERSION}-zip"
 
+# needed for raw upload and video playback
+pkg_dependencies="ufraw-batch ffmpeg"
+
 #=================================================
 # EXPERIMENTAL HELPERS
 #=================================================
 
-readonly YNH_DEFAULT_COMPOSER_VERSION=1.10.17
+readonly YNH_DEFAULT_COMPOSER_VERSION=2.0.8  #1.10.17
 # Declare the actual composer version to use.
 # A packager willing to use another version of composer can override the variable into its _common.sh.
 YNH_COMPOSER_VERSION=${YNH_COMPOSER_VERSION:-$YNH_DEFAULT_COMPOSER_VERSION}
diff --git a/scripts/backup b/scripts/backup
index e7ee942..65067e1 100755
--- a/scripts/backup
+++ b/scripts/backup
@@ -38,7 +38,7 @@ ynh_backup --src_path="$final_path"
 # BACKUP MEDIA FOLDER
 #=================================================
 
-#ynh_backup --src_path="/home/yunohost.$app" --is_big
+ynh_backup --src_path="/home/yunohost.$app" --is_big
 
 #=================================================
 # BACKUP THE NGINX CONFIGURATION
diff --git a/scripts/remove b/scripts/remove
index 17714d2..3d5a1ba 100755
--- a/scripts/remove
+++ b/scripts/remove
@@ -39,6 +39,14 @@ ynh_script_progression --message="Removing the MySQL database..." --weight=2
 # Remove a database if it exists, along with the associated user
 ynh_mysql_remove_db --db_user=$db_user --db_name=$db_name
 
+#=================================================
+# REMOVE DEPENDENCIES
+#=================================================
+ynh_script_progression --message="Removing dependencies..." --weight=2
+
+# Remove metapackage and its dependencies
+ynh_remove_app_dependencies
+
 #=================================================
 # REMOVE NGINX CONFIGURATION
 #=================================================
diff --git a/scripts/restore b/scripts/restore
index c0296af..12ecb3c 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -54,6 +54,13 @@ ynh_script_progression --message="Restoring Lychee main directory..." --weight=2
 
 ynh_restore_file --origin_path="$final_path"
 
+#=================================================
+# INSTALL DEPENDENCIES
+#=================================================
+ynh_script_progression --message="Installing dependencies..." --weight=3
+
+ynh_install_app_dependencies $pkg_dependencies
+
 #=================================================
 # RECREATE THE DEDICATED USER
 #=================================================
@@ -65,10 +72,10 @@ ynh_system_user_create --username=$app
 #=================================================
 # RESTORE DATA
 #=================================================
-#ynh_script_progression --message="Restoring Lychee data..."
+ynh_script_progression --message="Restoring Lychee data..."
 
 # Use --not_mandatory for the data directory, because if the backup has been made with BACKUP_CORE_ONLY, there's no data into the backup.
-#ynh_restore_file --origin_path="/home/yunohost.$app" --not_mandatory
+ynh_restore_file --origin_path="/home/yunohost.$app" --not_mandatory
 
 #=================================================
 # RESTORE USER RIGHTS
@@ -76,7 +83,7 @@ ynh_system_user_create --username=$app
 
 # Restore permissions on app files
 chown -R $app: $final_path
-#chmod -R 750 /home/yunohost.$app/{uploads,data}
+chmod -R 750 /home/yunohost.$app
 
 #=================================================
 # RESTORE THE PHP-FPM CONFIGURATION
diff --git a/scripts/upgrade b/scripts/upgrade
index 1f5c1f6..144f4b0 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -95,6 +95,13 @@ ynh_script_progression --message="Upgrading NGINX web server configuration..." -
 # Create a dedicated NGINX config
 ynh_add_nginx_config
 
+#=================================================
+# INSTALL DEPENDENCIES
+#=================================================
+ynh_script_progression --message="Installing dependencies..." --weight=3
+
+ynh_install_app_dependencies $pkg_dependencies
+
 #=================================================
 # CREATE DEDICATED USER
 #=================================================
@@ -121,8 +128,7 @@ ynh_script_progression --message="Installing Composer..." --weight=10
 # Install Composer
 ynh_install_composer
 
-ynh_exec_warn_less ynh_composer_exec --phpversion="$phpversion" --workdir="$final_path" --commands=\"dump-autoload\"
-ynh_exec_warn_less ynh_composer_exec --phpversion="$phpversion" --workdir="$final_path" --commands="update --lock"
+ynh_exec_warn_less ynh_composer_exec --commands=\"dump-autoload\"
 
 pushd "$final_path"
 	php$phpversion artisan migrate -n --force
@@ -140,7 +146,7 @@ ynh_store_file_checksum --file="$final_path/.env"
 
 # Set permissions on app files
 chown -R $app: $final_path
-#chmod -R 750 /home/yunohost.$app/{uploads,data}
+chmod -R 750 /home/yunohost.$app
 
 #=================================================
 # RELOAD NGINX