diff --git a/frontend/src/components/TopNav.tsx b/frontend/src/components/TopNav.tsx
index cef9180..fac23c1 100644
--- a/frontend/src/components/TopNav.tsx
+++ b/frontend/src/components/TopNav.tsx
@@ -1,9 +1,8 @@
 import axios from 'axios'
 import toCamel from 'camelcase-keys'
 import { useState, useEffect } from 'react'
-import { Link, useLocation, useNavigate } from 'react-router-dom'
+import { Link, useLocation, /* useNavigate */ } from 'react-router-dom'
 
-import { Button } from '@/components/ui/button'
 import { API_BASE_URL } from '@/config'
 import { WikiIdBus } from '@/lib/eventBus/WikiIdBus'
 import { cn } from '@/lib/utils'
@@ -22,7 +21,7 @@ type Menu = typeof Menu[keyof typeof Menu]
 
 export default ({ user }: Props) => {
   const location = useLocation ()
-  const navigate = useNavigate ()
+  // const navigate = useNavigate ()
 
   const [selectedMenu, setSelectedMenu] = useState<Menu> (Menu.None)
   const [wikiId, setWikiId] = useState<number | null> (WikiIdBus.get ())
@@ -116,14 +115,14 @@ export default ({ user }: Props) => {
     if (!(wikiId))
       return
 
-    void (async () => {
+    const fetchPostCount = async () => {
       try
       {
 	const pageRes = await axios.get (`${ API_BASE_URL }/wiki/${ wikiId }`)
 	const wikiPage = toCamel (pageRes.data as any, { deep: true }) as WikiPage
 
 	const tagRes = await axios.get (`${ API_BASE_URL }/tags/name/${ wikiPage.title }`)
-	const tag = toCamel (tagData, { deep: true }) as Tag
+	const tag = toCamel (tagRes.data as any, { deep: true }) as Tag
 
 	setPostCount (tag.postCount)
       }
@@ -131,7 +130,8 @@ export default ({ user }: Props) => {
       {
 	setPostCount (0)
       }
-    }) ()
+    }
+    fetchPostCount ()
   }, [wikiId])
 
   return (
diff --git a/frontend/src/pages/tags/NicoTagListPage.tsx b/frontend/src/pages/tags/NicoTagListPage.tsx
index bd5d7c6..1c374d1 100644
--- a/frontend/src/pages/tags/NicoTagListPage.tsx
+++ b/frontend/src/pages/tags/NicoTagListPage.tsx
@@ -58,7 +58,7 @@ export default ({ user }: Props) => {
 	    'X-Transfer-Code':  localStorage.getItem ('user_code') ?? '' } })
 	const data = toCamel (res.data as any, { deep: true }) as Tag[]
 	setNicoTags (nicoTags => {
-	  nicoTags.find (t => t.id === id).linkedTags = data
+	  nicoTags.find (t => t.id === id)!.linkedTags = data
 	  return [...nicoTags]
 	})
 	setRawTags (rawTags => ({ ...rawTags, [id]: data.map (t => t.name).join (' ') }))