diff --git a/cross-package.sh b/cross-package.sh
index 41c929f0..b40d40e5 100755
--- a/cross-package.sh
+++ b/cross-package.sh
@@ -155,7 +155,7 @@ case $cnc in
             $neuron_modules_dir/build/plugins/libplugin-mitsubishi_cnc.so \
             $neuron_modules_dir/build/plugins/libplugin-heidenhain_cnc.so \
             $package_dir/plugins/;
-
+        python3 update_default_plugins.py $package_dir/config/default_plugins.json "libplugin-focas.so,libplugin-mitsubishi_cnc.so,libplugin-heidenhain_cnc.so";
         cp $neuron_modules_dir/build/plugins/focas/libfocas32.so.1 $package_dir/;;
     (false)
         echo "no cnc";;
@@ -165,10 +165,12 @@ case $custom in
     (cun)
         cp 	$neuron_modules_dir/build/plugins/libplugin-gewu2.so \
             $neuron_modules_dir/build/plugins/libplugin-s7comm-for-un.so \
-            $package_dir/plugins/;;
+            $package_dir/plugins/;
+            python3 update_default_plugins.py $package_dir/config/default_plugins.json "libplugin-gewu2.so,libplugin-s7comm-for-un.so";;
     (hr)
         cp  $neuron_modules_dir/build/plugins/libplugin-iec104.so \
-            $package_dir/plugins/;;
+            $package_dir/plugins/;
+        python3 update_default_plugins.py $package_dir/config/default_plugins.json "libplugin-iec104.so";;
     (default)
         echo "no custom";;
 esac
diff --git a/update_default_plugins.py b/update_default_plugins.py
new file mode 100644
index 00000000..d94ef84b
--- /dev/null
+++ b/update_default_plugins.py
@@ -0,0 +1,38 @@
+import sys
+import json
+
+
+def update(file_path, plugins_str):
+    with open(file_path, 'r') as file:
+        data = file.read()
+
+    try:
+        json_data = json.loads(data)
+    except json.JSONDecodeError as e:
+        print(f"Error parsing JSON file: {e}")
+        sys.exit(1)
+
+    if 'plugins' not in json_data:
+        print(f"Error no plugins array:")
+        sys.exit(1)
+
+    plugins = plugins_str.split(',')
+    for plugin in plugins:
+        if plugin not in json_data['plugins']:
+            json_data['plugins'].append(plugin)
+
+    with open(file_path, 'w') as file:
+        json.dump(json_data, file, indent=4)
+
+    print(f"Plugins have been added to {file_path}")
+
+
+if __name__ == '__main__':
+    if len(sys.argv) != 3:
+        print("Usage: python script.py file_path plugins_str")
+        sys.exit(1)
+
+    file_path = sys.argv[1]
+    plugins_str = sys.argv[2]
+
+    update(file_path, plugins_str)