diff --git a/lib/redmine_dmsf/patches/issue_patch.rb b/lib/redmine_dmsf/patches/issue_patch.rb
index 00dd0b2e..4a38af0e 100644
--- a/lib/redmine_dmsf/patches/issue_patch.rb
+++ b/lib/redmine_dmsf/patches/issue_patch.rb
@@ -34,8 +34,7 @@ module RedmineDmsf
       def save_dmsf_attachments(dmsf_attachments)
         @saved_dmsf_attachments = []
         if dmsf_attachments
-          dmsf_attachments = dmsf_attachments.map(&:last)
-          dmsf_attachments.each do |dmsf_attachment|
+          dmsf_attachments.each do |_, dmsf_attachment|
             a = Attachment.find_by_token(dmsf_attachment[:token])
             @saved_dmsf_attachments << a if a
           end
@@ -49,8 +48,7 @@ module RedmineDmsf
       def save_dmsf_links(dmsf_links)
         @saved_dmsf_links = []
         if dmsf_links
-          ids = dmsf_links.map(&:last)
-          ids.each do |id|
+          dmsf_links.each do |_, id|
             l = DmsfLink.find_by_id(id)
             @saved_dmsf_links << l if l
           end