diff --git a/session_4/session_4.Rmd b/session_4/session_4.Rmd
index feeb7a6171c45e265ff85c29a2d6c4ebb18eebd1..be2041254f4fada8fe42b73da662b1e6269273aa 100644
--- a/session_4/session_4.Rmd
+++ b/session_4/session_4.Rmd
@@ -96,7 +96,7 @@ filter(flights, month == 1, day == 1)
 
 <div class="pencadre">
 Save the previous command in a `jan1` variable
-</div
+</div>
 <details><summary>Solution</summary>
 <p>
 ```{r filter_month_day_sav, include=TRUE}