diff --git a/backend/config/schedule.rb b/backend/config/schedule.rb
index 71de3c3..7ba2687 100644
--- a/backend/config/schedule.rb
+++ b/backend/config/schedule.rb
@@ -1,3 +1,5 @@
+env :PATH, '/root/.rbenv/shims:/root/.rbenv/bin:/usr/local/bin:/usr/bin:/bin'
+
 set :output, standard: '/var/log/btrc_hub_nico_sync.log',
              error:    '/var/log/btrc_hub_nico_sync_err.log'
 
diff --git a/backend/lib/tasks/sync_nico.rake b/backend/lib/tasks/sync_nico.rake
index d6e4f92..8fa3533 100644
--- a/backend/lib/tasks/sync_nico.rake
+++ b/backend/lib/tasks/sync_nico.rake
@@ -49,13 +49,13 @@ namespace :nico do
           end
           if post.tags.size < 20
             name = 'タグ希望'
-            post.tags.destroy(post.tags.find_by(name:))
+            post.tags.destroy(post.tags.find_by(name:) || [])
             post.tags << Tag.find_or_initialize_by(name:) { |tag|
               tag.category = 'meta'
             }
           end
           name = 'bot操作'
-          post.tags.destroy(post.tags.find_by(name:))
+          post.tags.destroy(post.tags.find_by(name:) || [])
           post.tags << Tag.find_or_initialize_by(name:) { |tag|
             tag.category = 'meta'
           }