diff --git a/scripts/_common.sh b/scripts/_common.sh
index 9747461..bfde399 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -72,6 +72,17 @@ myynh_add_fpm_config () {
 	sudo systemctl reload php5-fpm
 }
 
+myynh_set_permissions () {
+	[ $(sudo find "$final_path" -type f | wc -l) -gt 0 ] && sudo find "$final_path" -type f | xargs sudo chmod 0644
+	[ $(sudo find "$final_path" -type d | wc -l) -gt 0 ] && sudo find "$final_path" -type d | xargs sudo chmod 0755
+	[ $(sudo find "$data_path" -type f | wc -l) -gt 0 ] && sudo find "$data_path" -type f | xargs sudo chmod 0644
+	[ $(sudo find "$data_path" -type d | wc -l) -gt 0 ] && sudo find "$data_path" -type d | xargs sudo chmod 0755
+	sudo chown -R root:"$app" "$final_path"
+	sudo chown -R "$app": "$final_path/private"
+	sudo chown -R "$app": "$data_path"
+	sudo chown root: "$data_path"
+}
+
 # Remove the dedicated php-fpm config
 myynh_remove_fpm_config () {
 	ynh_secure_remove "$phpfpm_conf"
diff --git a/scripts/install b/scripts/install
index 943ae70..adbeb9b 100644
--- a/scripts/install
+++ b/scripts/install
@@ -74,13 +74,7 @@ sudo ln -s "$data_path/uploads" "$final_path/uploads"
 sudo ln -s "$data_path/thumbs" "$final_path/thumbs"
 
 # set permissions
-sudo find "$final_path" -type f | xargs sudo chmod 0644
-sudo find "$final_path" -type d | xargs sudo chmod 0755
-sudo find "$data_path" -type d | xargs sudo chmod 0755
-sudo chown -R root:"$app" "$final_path"
-sudo chown -R "$app": "$final_path/private"
-sudo chown -R "$app": "$data_path/uploads"
-sudo chown -R "$app": "$data_path/thumbs"
+myynh_set_permissions
 
 # configure nginx settings
 myynh_add_nginx_config
diff --git a/scripts/restore b/scripts/restore
index d74b573..2055b36 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -25,11 +25,10 @@ backup_core_only=$(ynh_app_setting_get "$app" backup_core_only)
 final_path="/var/www/$app"
 data_path="/home/yunohost.app/$app"
 nginx_conf="/etc/nginx/conf.d/$domain.d/$app.conf"
-phpfpm_conf="/etc/php5/fpm/pool.d/$app}.conf"
+phpfpm_conf="/etc/php5/fpm/pool.d/$app.conf"
 
 # check domain/path availability
 ynh_webpath_available "$domain" "$path_url"
-ynh_webpath_register "$app" "$domain" "$path_url"
 myynh_check_path "$final_path"
 
 # add required packages
@@ -42,26 +41,24 @@ ynh_system_user_create "$app"
 ynh_restore_file "$nginx_conf"
 ynh_restore_file "$phpfpm_conf"
 
-# restore source & their permissions
+# restore source
 ynh_restore_file "$final_path"
-sudo chown -R "$app": "$final_path"
-sudo chmod 755 "$final_path"
 
-# restore data & their permissions only if there is no data
+# restore data only if there is no data
 if [ ! -d "$data_path" ]; then
 	if [ $backup_core_only -eq 0 ]; then
 		ynh_restore_file "$data_path"
-		sudo chown -R "$app": "$data_path"
 	else
 		myynh_create_dir "$data_path/uploads"
-		sudo chown -R "$app": "$data_path/uploads"
 		myynh_create_dir "$data_path/thumbs"
-		sudo chown -R "$app": "$data_path/thumbs"
 	fi
 else
 	echo "$data_path already exists and will not be overwritten" >&2
 fi
 
+# set permissions
+myynh_set_permissions
+
 # restart services
 sudo systemctl reload php5-fpm
 sudo systemctl reload nginx
diff --git a/scripts/upgrade b/scripts/upgrade
index 871179c..916176d 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -74,14 +74,7 @@ sudo cp -a "$TMPDIR/." "$final_path"
 sudo rm -R "$TMPDIR"
 
 # set permissions
-sudo find "$final_path" -type f | xargs sudo chmod 0644
-sudo find "$final_path" -type d | xargs sudo chmod 0755
-sudo find "$data_path" -type f | xargs sudo chmod 0644
-sudo find "$data_path" -type d | xargs sudo chmod 0755
-sudo chown -R root:"$app" "$final_path"
-sudo chown -R "$app": "$final_path/private"
-sudo chown -R "$app": "$data_path/uploads"
-sudo chown -R "$app": "$data_path/thumbs"
+myynh_set_permissions
 
 # configure nginx settings
 myynh_add_nginx_config