diff --git a/frontend/src/pages/ResultsPage.tsx b/frontend/src/pages/ResultsPage.tsx
index e1e8598..bc2dd87 100644
--- a/frontend/src/pages/ResultsPage.tsx
+++ b/frontend/src/pages/ResultsPage.tsx
@@ -1,8 +1,11 @@
 export function ResultsPage() {
+  // BASE_URL is "/" in dev and "/<repo>/" on GitHub Pages, so the iframe
+  // resolves under the project subpath instead of the domain root.
+  const proto = `${import.meta.env.BASE_URL}proto/index.html`
   return (
     <main className="h-screen w-screen overflow-hidden bg-[#0b0f1a]">
       <iframe
-        src="/proto/index.html"
+        src={proto}
         title="Failure network"
         className="block h-full w-full border-0"
       />