diff --git a/src/content/lesson/bootstrap-tutorial-of-bootstrap-5.md b/src/content/lesson/bootstrap-tutorial-of-bootstrap-5.md
index c9239ad93..b8fa4d412 100644
--- a/src/content/lesson/bootstrap-tutorial-of-bootstrap-5.md
+++ b/src/content/lesson/bootstrap-tutorial-of-bootstrap-5.md
@@ -22,7 +22,7 @@ Besides, Bootstrap gives you a dozen of new elements that you would normally wan
 ## Layouts: Solving the Box Model
 
 
-One of the broken things in CSS is the way that layouts work – working with **float**, **display** and **position** sucks.  This is how Bootstrap solved it:
+One of the broken things in CSS is the way that layouts work, working with **float**, **display** and **position** sucks.  This is how Bootstrap solved it:
 
 ## Everything is now divided into Rows and Columns.