diff --git a/scripts/upgrade b/scripts/upgrade
index 87319e5..00d5bda 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -9,6 +9,7 @@
 source _common.sh
 source detect_arch
 source ynh_systemd_action
+source ynh_check_app_version_changed
 source /usr/share/yunohost/helpers
 
 #=================================================
@@ -35,6 +36,12 @@ final_path=$(ynh_app_setting_get $app final_path)
 db_name=$(ynh_app_setting_get $app db_name)
 port=$(ynh_app_setting_get $app port)
 
+#=================================================
+# CHECK VERSION
+#=================================================
+
+upgrade_type=$(ynh_check_app_version_changed)
+
 #=================================================
 # ENSURE DOWNWARD COMPATIBILITY
 #=================================================
@@ -93,8 +100,11 @@ path_url=$(ynh_normalize_url_path $path_url)
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
 
+if [ "$upgrade_type" == "UPGRADE_APP" ]
+then
 # Download, check integrity, uncompress and patch the source from app.src
 ynh_setup_source "$final_path"
+fi
 
 #=================================================
 # NGINX CONFIGURATION