diff --git a/style.css b/style.css
index f7200e1..dd28b52 100644
--- a/style.css
+++ b/style.css
@@ -481,7 +481,8 @@ tr:nth-child(odd) {
 
 #tab1:checked ~ #content1,
 #tab2:checked ~ #content2,
-#tab3:checked ~ #content3 {
+#tab3:checked ~ #content3,
+#tab4:checked ~ #content4 {
     display: block;
 }