diff --git a/frontend/index.html b/frontend/index.html
index 928349d..273b27d 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -2,7 +2,7 @@
 <html lang="en">
   <head>
     <meta charset="UTF-8" />
-    <link rel="icon" type="image/svg+xml" href="/favicon.svg" />
+    <link rel="icon" type="image/png" href="/aegis-logo.png" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <title>Aegis — MITRE ATT&CK Coverage</title>
   </head>
diff --git a/frontend/public/aegis-logo.png b/frontend/public/aegis-logo.png
new file mode 100644
index 0000000..7079bf9
Binary files /dev/null and b/frontend/public/aegis-logo.png differ
diff --git a/frontend/src/components/Sidebar.tsx b/frontend/src/components/Sidebar.tsx
index 95834d3..7cd765b 100644
--- a/frontend/src/components/Sidebar.tsx
+++ b/frontend/src/components/Sidebar.tsx
@@ -184,7 +184,7 @@ export default function Sidebar() {
     <aside className="flex h-screen w-60 flex-col border-r border-gray-800 bg-gray-900">
       {/* Logo */}
       <div className="flex h-16 items-center gap-3 px-5">
-        <img src="/aegis-logo.svg" alt="Aegis" className="h-8 w-8" />
+        <img src="/aegis-logo.png" alt="Aegis" className="h-8 w-8 rounded-full" />
         <span className="text-lg font-bold tracking-wide text-white">
           Aegis
         </span>
