diff --git a/README.md b/README.md
index 7788ea6..1d33372 100644
--- a/README.md
+++ b/README.md
@@ -65,7 +65,7 @@ server {
 ```sh
 $ # 匯入 MongoDB 公鑰到套件管理系統
 $ wget http://archive.ubuntu.com/ubuntu/pool/main/o/openssl1.0/libssl1.0.0_1.0.2n-1ubuntu5.6_amd64.deb  #Ubuntu 20.04LTS
-$ sudo dpkg -i libssl1.0.0_1.0.2n-1ubuntu5.5_amd64.deb  #Ubuntu 20.04LTS
+$ sudo dpkg -i libssl1.0.0_1.0.2n-1ubuntu5.6_amd64.deb  #Ubuntu 20.04LTS
 $ wget -qO - https://www.mongodb.org/static/pgp/server-3.2.asc | sudo apt-key add -
 $ # 建立 list file
 $ echo "deb http://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.2 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.2.list