diff --git a/fgu_sync.rake b/fgu_sync.rake
index cd442c7..7f3f227 100644
--- a/fgu_sync.rake
+++ b/fgu_sync.rake
@@ -329,7 +329,9 @@ namespace :fgu_sync do
                 av.save
               end
               dt["courses"].each do |course|
-                course_html += "<a data-year='#{course["year"].to_i + 1911}' data-sem='#{course["sem"]}' href='#{course["course_url"]}' target='_blank'>#{course["course_id"]} #{course["course_name"]}</a><br />"
+                course_url = course["course_url"]
+                course_url.gsub!(/http:\/\/(.*\.fgu\.edu\.tw)/, 'https://\1')
+                course_html += "<a data-year='#{course["year"].to_i + 1911}' data-sem='#{course["sem"]}' href='#{course_url}' target='_blank'>#{course["course_id"]} #{course["course_name"]}</a><br />"
                 av.value= {:en => course_html, :zh_tw => course_html}
                 av.save
               end