diff --git a/frontend/src/components/PostList.tsx b/frontend/src/components/PostList.tsx
index 31cce00..67a3a28 100644
--- a/frontend/src/components/PostList.tsx
+++ b/frontend/src/components/PostList.tsx
@@ -12,15 +12,14 @@ export default (({ posts, onClick }: Props) => (
     <div className="flex flex-wrap gap-6 p-4">
       {posts.map ((post, i) => (
 	  <Link to={`/posts/${ post.id }`}
-		key={i}
+		key={post.id}
 		className="w-40 h-40 overflow-hidden rounded-lg shadow-md hover:shadow-lg"
 		onClick={onClick}>
 	    <img src={post.thumbnail || post.thumbnailBase || undefined}
 		 alt={post.title || post.url}
 		 title={post.title || post.url || undefined}
-		 loading="eager"
-		 fetchPriority="high"
+		 loading={i < 12 ? 'eager' : 'lazy'}
 		 decoding="async"
-		 className="object-none w-full h-full" />
+		 className="object-cover w-full h-full"/>
 	  </Link>))}
     </div>)) satisfies FC<Props>
diff --git a/frontend/src/components/TopNav.tsx b/frontend/src/components/TopNav.tsx
index 84e113d..104f40e 100644
--- a/frontend/src/components/TopNav.tsx
+++ b/frontend/src/components/TopNav.tsx
@@ -36,7 +36,6 @@ export default (({ user }: Props) => {
 	  { name: '別名タグ', to: '/tags/aliases', visible: false },
 	  { name: '上位タグ', to: '/tags/implications', visible: false },
 	  { name: 'ニコニコ連携', to: '/tags/nico' },
-	  { name: 'タグのつけ方', to: '/wiki/ヘルプ:タグのつけ方' },
 	  { name: 'ヘルプ', to: '/wiki/ヘルプ:タグ' }] },
       { name: 'Wiki', to: '/wiki/ヘルプ:ホーム', base: '/wiki', subMenu: [
 	  { name: '検索', to: '/wiki' },