diff --git a/scripts/upgrade b/scripts/upgrade
index e4a97f3..774524c 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -205,13 +205,16 @@ do
     # Backup 3rd party applications from the current nextcloud
     # But do not overwrite if there is any upgrade
     # (apps directory already exists in Nextcloud archive)
-    for nc_app_dir in "$(ls -1 "$final_path/apps")"
+    (
+		cd $final_path/apps
+    for nc_app_dir in */
     do
-        if [ ! -d "$tmpdir/apps/$nc_app_dir" ]
-	then
-            cp -a "$final_path/apps/$nc_app_dir" "$tmpdir/apps/$nc_app_dir"
-	fi
+      if [ ! -d "$tmpdir/apps/$nc_app_dir" ]
+      then
+        cp -a "$nc_app_dir" "$tmpdir/apps/$nc_app_dir"
+      fi
     done
+    )
 
     # Replace the old nextcloud by the new one
     ynh_secure_remove "$final_path"