diff --git a/Blogs-and-tutorials.md b/Blogs-and-tutorials.md
index 010e23b..76d0779 100644
--- a/Blogs-and-tutorials.md
+++ b/Blogs-and-tutorials.md
@@ -11,7 +11,7 @@ Here are some blogs that may help you:
 1. https://www.ershiwo.com/2016/03/use-lets-encrypt-on-multi-servers.html
 1. http://frankwei.xyz/kuai-su-ban-fa-ge-mian-fei-de-sslzheng-shu/
 1. http://www.yilan.io/article/5703d07dc41b4c012e973bcb
-
+1. https://yatesun.com/2016/04/lets-encrypt-certificate/
 
 
 ## English