diff --git a/docs/_docs/guide/01-quickstart.md b/docs/_docs/guide/01-quickstart.md
index 88bc90f73..74de1eda0 100644
--- a/docs/_docs/guide/01-quickstart.md
+++ b/docs/_docs/guide/01-quickstart.md
@@ -78,8 +78,8 @@ Import the public key used by the package management system.
 
 ```bash
 $ sudo apt update
-$ sudo apt install wget gnupg
-$ wget -qO - https://pgp.mongodb.com/server-6.0.asc | sudo apt-key add -
+$ sudo apt install gnupg
+$ curl -fsSL https://pgp.mongodb.com/server-6.0.asc | sudo gpg -o /usr/share/keyrings/mongodb-server-6.0.gpg --dearmor
 ```
 
 Create the list file /etc/apt/sources.list.d/mongodb-org-6.0.list for your version of Ubuntu.
diff --git a/docs/_docs/guide/02-building-open5gs-from-sources.md b/docs/_docs/guide/02-building-open5gs-from-sources.md
index f2e796a1e..6735405dd 100644
--- a/docs/_docs/guide/02-building-open5gs-from-sources.md
+++ b/docs/_docs/guide/02-building-open5gs-from-sources.md
@@ -17,8 +17,8 @@ Import the public key used by the package management system.
 
 ```bash
 $ sudo apt update
-$ sudo apt install wget gnupg
-$ wget -qO - https://pgp.mongodb.com/server-6.0.asc | sudo apt-key add -
+$ sudo apt install gnupg
+$ curl -fsSL https://pgp.mongodb.com/server-6.0.asc | sudo gpg -o /usr/share/keyrings/mongodb-server-6.0.gpg --dearmor
 ```
 
 Create the list file /etc/apt/sources.list.d/mongodb-org-6.0.list for your version of Ubuntu.
diff --git a/docs/_docs/tutorial/01-your-first-lte.md b/docs/_docs/tutorial/01-your-first-lte.md
index 9a84550b1..5f2958ea0 100644
--- a/docs/_docs/tutorial/01-your-first-lte.md
+++ b/docs/_docs/tutorial/01-your-first-lte.md
@@ -165,7 +165,7 @@ $ make test
 The Open5GS package is available on the recent versions of *Ubuntu*.
 ```bash
 # Install the MongoDB Packages
-$ wget -qO - https://pgp.mongodb.com/server-6.0.asc | sudo apt-key add -
+$ curl -fsSL https://pgp.mongodb.com/server-6.0.asc | sudo gpg -o /usr/share/keyrings/mongodb-server-6.0.gpg --dearmor
 $ echo "deb [ arch=amd64,arm64 signed-by=/usr/share/keyrings/mongodb-server-6.0.gpg] https://repo.mongodb.org/apt/ubuntu jammy/mongodb-org/6.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-6.0.list
 $ sudo apt update
 $ sudo apt install mongodb-org