diff --git a/css/clock.css b/css/clock.css
index cc55224..6312908 100644
--- a/css/clock.css
+++ b/css/clock.css
@@ -13,6 +13,7 @@
 body, html {
   height: 100vh;
   width: 100vw;
+  user-select: none;
 }
 
 .clock {