diff --git a/doc/python/sankey-diagram.md b/doc/python/sankey-diagram.md
index cf6bfbfc3ce..9a10d2074fd 100644
--- a/doc/python/sankey-diagram.md
+++ b/doc/python/sankey-diagram.md
@@ -73,7 +73,7 @@ response = urllib.request.urlopen(url)
 data = json.loads(response.read())
 
 # override gray link colors with 'source' colors
-opacity = 0.4
+opacity = 0.2
 # change 'magenta' to its 'rgba' value to add opacity
 data['data'][0]['node']['color'] = ['rgba(255,0,255, 0.8)' if color == "magenta" else color for color in data['data'][0]['node']['color']]
 data['data'][0]['link']['color'] = [data['data'][0]['node']['color'][src].replace("0.8", str(opacity))
@@ -199,4 +199,4 @@ fig.show()
 
 ### Reference
 
-See [https://plotly.com/python/reference/#sankey](https://plotly.com/python/reference/#sankey) for more information and options!
\ No newline at end of file
+See [https://plotly.com/python/reference/#sankey](https://plotly.com/python/reference/#sankey) for more information and options!