diff --git a/app/helpers/repositories_helper.rb b/app/helpers/repositories_helper.rb
index 1897f3ae0..9cb64b355 100644
--- a/app/helpers/repositories_helper.rb
+++ b/app/helpers/repositories_helper.rb
@@ -102,7 +102,7 @@ module RepositoriesHelper
       begin
         s_content = s[0]
         # 链接直接跳过不做替换
-        next if s_content.starts_with?('http://') || s_content.starts_with?('https://') || s_content.starts_with?('mailto:')
+        next if s_content.starts_with?('http://') || s_content.starts_with?('https://') || s_content.starts_with?('mailto:') || s_content.blank?
         ext = File.extname(s_content)[1..-1]
 
         if image_type?(ext) || download_type(ext)