diff --git a/Blogs-and-tutorials.md b/Blogs-and-tutorials.md
index ba6fda0..791b1e2 100644
--- a/Blogs-and-tutorials.md
+++ b/Blogs-and-tutorials.md
@@ -34,7 +34,7 @@ Here are some blogs that may help you:
 1. http://www.yilan.io/article/5703d07dc41b4c012e973bcb
 1. https://yatesun.com/2016/04/lets-encrypt-certificate/
 1. https://simiki.xulog.com/linux/issue%20and%20install%20cert.html
-1. https://zhangly.com/use-acme-sh/
+