diff --git a/session_4/session_4.Rmd b/session_4/session_4.Rmd
index 44644d296b30528e00aaba6fb2045a7e0761c29f..ee6f04a5556cb56c1a09944f2cd98c7d04df710e 100644
--- a/session_4/session_4.Rmd
+++ b/session_4/session_4.Rmd
@@ -180,9 +180,11 @@ Find all flights that:
 
 <details><summary>Solution</summary>
 <p>
+
 ```{r filter_chalenges_a, eval=TRUE}
 filter(flights, arr_delay >= 60 | arr_delay <= 120)
 ```
+
 ```{r filter_chalenges_b, eval=TRUE}
 filter(flights, dest %in% c("IAH", "HOU"))
 ```