diff --git a/app/index.html b/app/index.html
index d3f5046..bebe845 100644
--- a/app/index.html
+++ b/app/index.html
@@ -11,6 +11,10 @@
           padding: 0;
         }
 
+        [tabindex] {
+          outline: none;
+        }
+
         @keyframes updateDark {
           0%   {background-color: none;}
           25%  {background-color: #3f51b5;}