diff --git a/mmpSearch/scripts/indexa.py b/mmpSearch/scripts/indexa.py
index c554b9e..8c9fd9c 100644
--- a/mmpSearch/scripts/indexa.py
+++ b/mmpSearch/scripts/indexa.py
@@ -84,8 +84,8 @@ def process_mmps_in_folder(folder_path):
             file_name = os.path.basename(destination_path)
             file_name = os.path.splitext(file_name)[0] + ".mmp"
             output_file_path = os.path.join(folder_path, file_name)
-            QT_DEBUG_PLUGINS=1
-            QT_QPA_PLATFORM=offscreen 
+            os.environ['QT_DEBUG_PLUGINS'] = '1'
+            os.environ['QT_QPA_PLATFORM'] = 'offscreen'
             comando = f'lmms --dump "{destination_path}" > "{output_file_path}"'
             try:
                 subprocess.run(comando, shell=True, check=True)