diff --git a/backend/app/controllers/tags_controller.rb b/backend/app/controllers/tags_controller.rb
index 0cb8dd5..aed029f 100644
--- a/backend/app/controllers/tags_controller.rb
+++ b/backend/app/controllers/tags_controller.rb
@@ -434,5 +434,7 @@ class TagsController < ApplicationController
     return canonical if canonical
 
     html[/"channelId":"(UC[a-zA-Z0-9_-]{22})"/, 1] || html[/\bUC[a-zA-Z0-9_-]{22}\b/]
+  rescue
+    nil
   end
 end
diff --git a/frontend/src/components/TagLink.tsx b/frontend/src/components/TagLink.tsx
index 81b108f..a68f8a9 100644
--- a/frontend/src/components/TagLink.tsx
+++ b/frontend/src/components/TagLink.tsx
@@ -55,7 +55,7 @@ export default (({ tag,
 			?
 		      </PrefetchLink>)
 		  : (
-		      tag.hasWiki
+		      tag.materialId != null
 		      ? (
 			  <PrefetchLink
 			      to={`/materials/${ tag.materialId }`}
diff --git a/frontend/src/consts.ts b/frontend/src/consts.ts
index d679de3..466b7f0 100644
--- a/frontend/src/consts.ts
+++ b/frontend/src/consts.ts
@@ -31,11 +31,11 @@ export const FETCH_POSTS_ORDER_FIELDS = [
     'updated_at',
     ] as const
 
+export const PLATFORMS = ['nico', 'youtube'] as const
+
 export const PLATFORM_NAMES: Record<Platform, string> =
     { nico: 'ニコニコ', youtube: 'YouTube' } as const
 
-export const PLATFORMS = ['nico', 'youtube'] as const
-
 export const TAG_COLOUR = {
     deerjikist: 'rose',
     meme:       'purple',
diff --git a/frontend/src/pages/deerjikists/DeerjikistDetailPage.tsx b/frontend/src/pages/deerjikists/DeerjikistDetailPage.tsx
index 5f07907..ee3651f 100644
--- a/frontend/src/pages/deerjikists/DeerjikistDetailPage.tsx
+++ b/frontend/src/pages/deerjikists/DeerjikistDetailPage.tsx
@@ -65,7 +65,7 @@ export default (() => {
 
     setData (deerjikists)
     setDisabled (false)
-  }, [deerjikists])
+  }, [tag, deerjikists])
 
   return (
       <MainArea>