diff --git a/app/models/fs/message_draft.rb b/app/models/fs/message_draft.rb
index df66f84a..18b9d9ab 100644
--- a/app/models/fs/message_draft.rb
+++ b/app/models/fs/message_draft.rb
@@ -32,7 +32,7 @@ def self.create_and_validate_with_fs_form(form_files: [], author:, fs_client: Fs
     form_files.each do |form_file|
       form_content = form_file.read.force_encoding("UTF-8")
       form_information = fs_client.api.parse_form(form_content)
-      dic = form_information['subject']
+      dic = form_information['subject']&.strip
       fs_form_identifier = form_information['form_identifier']
 
       box = Fs::Box.with_enabled_message_drafts_import.find_by("settings ->> 'dic' = ?", dic)