diff --git a/docs/tech_docs/python/economics_presentation_sample.md b/docs/tech_docs/python/economics_presentation_sample.md
index 486f5c7..559ffab 100644
--- a/docs/tech_docs/python/economics_presentation_sample.md
+++ b/docs/tech_docs/python/economics_presentation_sample.md
@@ -86,6 +86,7 @@ The script generates a PowerPoint presentation including slides on:
 To customize slide content and layout, modify the `PresentationCreator` class in your script:
 
 ```python
+#!/usr/bin/env python3
 from pptx import Presentation
 from pptx.util import Inches, Pt
 from pptx.enum.shapes import MSO_SHAPE