diff --git a/1-exercise-solutions/lesson-04/4i.html b/1-exercise-solutions/lesson-04/4i.html
index fb3bf41..dacf4e8 100644
--- a/1-exercise-solutions/lesson-04/4i.html
+++ b/1-exercise-solutions/lesson-04/4i.html
@@ -9,9 +9,9 @@
     padding-left: 15px;
     padding-right: 15px;
     cursor: pointer;
-    transition: padding-top 1s,
-      padding-bottom 1s,
-      padding-left 1s,
+    transition: padding-top 1s;
+      padding-bottom 1s;
+      padding-left 1s;
       padding-right 1s;
   }