diff --git a/public/png/png.js b/public/png/png.js
index e771cf4..0f2f956 100644
--- a/public/png/png.js
+++ b/public/png/png.js
@@ -10,6 +10,7 @@ if (!errorEl || !explorerEl) throw new Error("HTML is not set up correctly");
 
 const main = () => {
   // TODO: We may want a better UI here.
+  // TODO: Handle hash changes.
   const parsedHash = parseHash(location.hash);
   if (!parsedHash) {
     location.href = "..";