diff --git a/pages/index.tsx b/pages/index.tsx
index 02f2ebd..f949c88 100644
--- a/pages/index.tsx
+++ b/pages/index.tsx
@@ -395,7 +395,9 @@ pre > code {
             onChange={(e) => setModel(e.target.value)}
           >
             {models.map((m) => (
-              <option value={m}>{m}</option>
+              <option key={m} value={m}>
+                {m}
+              </option>
             ))}
           </select>
         </div>