diff --git a/book/chapter-06-gbapp-reference.md b/book/chapter-06-gbapp-reference.md
index 79eccb85..8a9feaa4 100644
--- a/book/chapter-06-gbapp-reference.md
+++ b/book/chapter-06-gbapp-reference.md
@@ -49,13 +49,14 @@ cd BotServer
 
 ### Linux (Ubuntu)
 
+```
 sudo apt update
 sudo apt install software-properties-common apt-transport-https wget
 wget -q https://packages.microsoft.com/keys/microsoft.asc -O- | sudo apt-key add -
 sudo add-apt-repository "deb [arch=amd64] https://packages.microsoft.com/repos/vscode stable main"
 sudo apt update
 sudo apt install code
-
+```
 
 
 ### Commands to check version of Node.js and NPM.