Update app.py

app.py

@@ -69,7 +69,7 @@ def index():
                 else:  # PNG
                     # Convert HTML to PNG using imgkit
                     png_path = os.path.join(TEMP_DIR, "output.png")
-                    imgkit.from_string(full_html, png_path, options={"quiet": ""})
+                    imgkit.from_string(full_html, png_path, options={"quiet": "",'encoding': "UTF-8"})
                     return send_file(
                         png_path,
                         as_attachment=True,