diff --git a/conf/app.src b/conf/app.src
index dd318bd..18bd079 100644
--- a/conf/app.src
+++ b/conf/app.src
@@ -1,6 +1,5 @@
-SOURCE_URL=https://github.com/fisharebest/webtrees/releases/download/2.0.16/webtrees-2.0.16.zip
-SOURCE_SUM=c9327e92df83b3ccfa73d4a5c963357ab25be7daa471fa4ecb157f06b9615366
+SOURCE_URL=https://github.com/fisharebest/webtrees/releases/download/2.0.17/webtrees-2.0.17.zip
+SOURCE_SUM=cf354f7fff855881bc9647b98a517654ded5a780d5f09737bc2bef17e1cccd71
 SOURCE_SUM_PRG=sha256sum
 SOURCE_FORMAT=zip
 SOURCE_IN_SUBDIR=true
-SOURCE_FILENAME=
diff --git a/manifest.json b/manifest.json
index 55b88e7..46e9638 100644
--- a/manifest.json
+++ b/manifest.json
@@ -6,7 +6,7 @@
         "en": "Web-based genealogy application",
         "fr": "Logiciel libre de généalogie en ligne"
     },
-    "version":"2.0.16~ynh1",
+    "version":"2.0.17~ynh1",
     "url": "https://www.webtrees.net",
     "license": "GPL-3.0-or-later",
     "maintainer": {
diff --git a/scripts/upgrade b/scripts/upgrade
index 973f33d..2620c8a 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -21,6 +21,26 @@ domain=$(ynh_app_setting_get --app=$app --key=domain)
 path_url=$(ynh_app_setting_get --app=$app --key=path)
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 
+#=================================================
+# CHECK VERSION
+#=================================================
+
+upgrade_type=$(ynh_check_app_version_changed)
+
+#=================================================
+# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
+#=================================================
+ynh_script_progression --message="Backing up $app before upgrading (may take a while)..."
+
+# Backup the current version of the app
+ynh_backup_before_upgrade
+ynh_clean_setup () {
+	# restore it if the upgrade fails
+	ynh_restore_upgradebackup
+}
+# Exit if an error occurs during the execution of the script
+ynh_abort_if_errors
+
 #=================================================
 # ENSURE DOWNWARD COMPATIBILITY
 #=================================================
@@ -45,20 +65,6 @@ if ynh_legacy_permissions_exists; then
 	ynh_app_setting_delete --app=$app --key=is_public
 fi
 
-#=================================================
-# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
-#=================================================
-ynh_script_progression --message="Backing up $app before upgrading (may take a while)..."
-
-# Backup the current version of the app
-ynh_backup_before_upgrade
-ynh_clean_setup () {
-	# restore it if the upgrade fails
-	ynh_restore_upgradebackup
-}
-# Exit if an error occurs during the execution of the script
-ynh_abort_if_errors
-
 #=================================================
 # CREATE DEDICATED USER
 #=================================================
@@ -74,17 +80,21 @@ ynh_system_user_create --username=$app --home_dir="$final_path"
 #=================================================
 ynh_script_progression --message="Upgrading source files..."
 
-# Move old app dir
-mv ${final_path} ${final_path}.old
+if [ "$upgrade_type" == "UPGRADE_APP" ]
+then
+	ynh_script_progression --message="Upgrading source files..."
+	# Move old app dir
+	mv ${final_path} ${final_path}.old
 
-# Download, check integrity, uncompress and patch the source from app.src
-ynh_setup_source "$final_path"
+	# Download, check integrity, uncompress and patch the source from app.src
+	ynh_setup_source "$final_path"
 
-# restore data
-cp -a ${final_path}.old/data ${final_path}
+	# restore data
+	cp -a ${final_path}.old/data ${final_path}
 
-# delete temp directory
-ynh_secure_remove --file=${final_path}.old
+	# delete temp directory
+	ynh_secure_remove --file=${final_path}.old
+fi
 
 chmod 750 "$final_path"
 chmod -R 700 $final_path/data