diff --git a/css/main.css b/css/main.css
index 90f7a40..72a2ccd 100644
--- a/css/main.css
+++ b/css/main.css
@@ -24,6 +24,7 @@ header {
     position: -webkit-sticky;
     position: sticky;
     top: 0;
+    z-index: 1;
 }
 
 header::after {