diff --git a/announcement.gemspec b/announcement.gemspec
index 49ae6e1..07b80fe 100644
--- a/announcement.gemspec
+++ b/announcement.gemspec
@@ -115,7 +115,7 @@ if bundle_update_flag
               default_announcement_widget_info.each do |h|
                 name_without_index = h["name"]["zh_tw"].sub(/\d+/,'')
                 widget_info_index = (widget_info.index{|hh| hh["name"]["zh_tw"].include?(name_without_index)} rescue -1)
-                if widget_info_index == -1
+                if (widget_info_index == -1 || widget_info_index.nil?)
                   update_flag = true
                   copy_h = h.dup
                   h.delete("force_cover")