diff --git a/app/routes/index.tsx b/app/routes/index.tsx
index df8549a..a8ebeb7 100644
--- a/app/routes/index.tsx
+++ b/app/routes/index.tsx
@@ -26,7 +26,7 @@ const Posts: FC = () => {
     <div class="mt-16">
       <ul class="mt-10">
         {entries.map(([id, module]) => (
-          <li class="text-lg mt-2 md:mt-1">
+          <li key={id} class="text-lg mt-2 md:mt-1">
             <span class="tabular-nums tnum">{module.frontmatter.date}: </span>
             <br class="block md:hidden" />
             <a
diff --git a/package.json b/package.json
index 9ff974a..ac43ab6 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
     "remark-mdx-frontmatter": "^4.0.0"
   },
   "devDependencies": {
-    "@biomejs/biome": "1.6.4",
+    "@biomejs/biome": "1.7.0",
     "@cloudflare/workers-types": "^4.20240222.0",
     "@hono/vite-cloudflare-pages": "^0.2.5",
     "@hono/vite-ssg": "^0.1.0",