diff --git a/.github/ISSUE_TEMPLATE/bug_report.md b/.github/ISSUE_TEMPLATE/bug_report.md
index dd84ea7..dbb4eb3 100644
--- a/.github/ISSUE_TEMPLATE/bug_report.md
+++ b/.github/ISSUE_TEMPLATE/bug_report.md
@@ -24,7 +24,7 @@ A clear and concise description of what you expected to happen.
 If applicable, add screenshots to help explain your problem.
 
 **Desktop (please complete the following information):**
- - OS: [e.g. iOS]
+ - OS: [e.g. MacOS]
  - Browser [e.g. chrome, safari]
  - Version [e.g. 22]
 
diff --git a/gui/utils.py b/gui/utils.py
index 534025c..476579b 100644
--- a/gui/utils.py
+++ b/gui/utils.py
@@ -1,18 +1,16 @@
+import logging
 import os
+from typing import Optional
 
 
 from interpreter.NassiShneidermann import NassiShneidermanDiagram
 from draw.Iinstruction import *
 
 
-def nassi(filepath: str, output_path: str, outputname, gui, font_filepath=None):
+def nassi(filepath: str, output_path: str, outputname: str, gui, font_filepath: Optional[str]=None):
     NSD = NassiShneidermanDiagram(gui.debug_mode)
-    # if font_filepath is None:
-    #    pass
-    # else:
-    # if font_filepath is not None or font_filepath != "":
     if font_filepath != None:
-        NSD.set_font(str(font_filepath))
+        NSD.set_font(font_filepath)
     NSD.load_from_file(filepath)
     NSD.convert_to_image(output_path, outputname, 500)