diff --git a/content/course/modelisation/0_preprocessing.Rmd b/content/course/modelisation/0_preprocessing.Rmd
index b6fb99a12..f39fd6c12 100644
--- a/content/course/modelisation/0_preprocessing.Rmd
+++ b/content/course/modelisation/0_preprocessing.Rmd
@@ -211,7 +211,7 @@ fig_plotly.update_traces(
 fig_plotly.update_layout(
         title_text = "Reproduction of the \"Acres don't vote, people do\" map <br>(Click legend to toggle traces)",
         showlegend = True,
-        geo = {"scope" = 'usa', "landcolor" = 'rgb(217, 217, 217)'}
+        geo = {"scope": 'usa', "landcolor": 'rgb(217, 217, 217)'}
     )
 ```