diff --git a/01-flex-center/style.css b/01-flex-center/style.css
index e35feac..52dbe94 100644
--- a/01-flex-center/style.css
+++ b/01-flex-center/style.css
@@ -3,6 +3,9 @@
   border: 4px solid midnightblue;
   width: 400px;
   height: 300px;
+  display: flex;
+  justify-content: center;
+  align-items: center;
 }
 
 .box {