diff --git a/frontend/src/pages/posts/PostListPage.tsx b/frontend/src/pages/posts/PostListPage.tsx
index a375014..8093aeb 100644
--- a/frontend/src/pages/posts/PostListPage.tsx
+++ b/frontend/src/pages/posts/PostListPage.tsx
@@ -35,7 +35,10 @@ export default () => {
 		  ...(withCursor && { cursor }) } })
     const data = toCamel (res.data as any, { deep: true }) as { posts:      Post[]
 								nextCursor: string }
-    setPosts (posts => [...(withCursor ? posts : []), ...data.posts])
+    setPosts (posts => (
+	[...((new Map ([...(withCursor ? posts : []), ...data.posts]
+		       .map (post => [post.id, post])))
+	     .values ())]))
     setCursor (data.nextCursor)
 
     setLoading (false)
@@ -79,7 +82,6 @@ export default () => {
 	setPosts ([])
 	loadMore (false)
       }
-    sessionStorage.removeItem ('posts')
 
     setWikiPage (null)
     if (tags.length === 1)