diff --git a/app/views/stats/index.haml b/app/views/stats/index.haml
index e77454b..63aa76c 100644
--- a/app/views/stats/index.haml
+++ b/app/views/stats/index.haml
@@ -10,7 +10,7 @@
 
     .mb-3
       - StatsController::INTERVALS.each do |interval|
-        = link_to t(".#{interval}"), site_stats_path(interval: interval), class: 'btn'
+        = link_to t(".#{interval}"), site_stats_path(interval: interval), class: "btn #{'btn-primary active' if params[:interval].to_sym == interval}"
 
     .mb-3
       %h2= t('.host', count: @hostnames.size)