diff --git a/Slides/__init__.py b/Slides/__init__.py
index a688fa2..c3bb555 100644
--- a/Slides/__init__.py
+++ b/Slides/__init__.py
@@ -1,10 +1,10 @@
 #!/bin/env python3
 
 from . import cell_manager
-from . import presentation_helper
 from . import count_slides
-from . import math_helper
+# from . import math_helper
+# from . import presentation_helper
 from . import mail_helper
 from . import class_helper
 from . import PythonLatex
 from . import timeline_helper