diff --git a/app/services/nicovideo_ranking_service.rb b/app/services/nicovideo_ranking_service.rb
index 90b565d2daeaef..bb6c896af8d03a 100644
--- a/app/services/nicovideo_ranking_service.rb
+++ b/app/services/nicovideo_ranking_service.rb
@@ -36,7 +36,7 @@ def process(hash)
 
           desc.css('.nico-thumbnail img').tap do |link|
             ret[:title] = link.attr('alt').value
-            ret[:thumbnail] = "https://tn.smilevideo.jp/smile?i=#{id}"
+            ret[:thumbnail] = link.attr('src').value.gsub(/\Ahttp:/,'https:')
           end
 
           desc.css('.nico-info-date').tap do |date|