diff --git a/default.nix b/default.nix
index 54c0908..08afcb4 100644
--- a/default.nix
+++ b/default.nix
@@ -110,6 +110,10 @@ let
         const sourceTarget = document.createElement('script')
         sourceTarget.src = '/main.js'
         document.body.appendChild(sourceTarget)
+
+        if ('serviceWorker' in navigator) {
+          window.addEventListener('load', () => navigator.serviceWorker.register('/sw.js'));
+        }
       '';
 
       templateHtml = pkgs.writeText "template-html" ''