diff --git a/book/chapter-06-gbapp-reference.md b/book/chapter-06-gbapp-reference.md
index afccf543..c12355d7 100644
--- a/book/chapter-06-gbapp-reference.md
+++ b/book/chapter-06-gbapp-reference.md
@@ -21,7 +21,7 @@ session.
 
 1. [Optional] Install [Chocolatey](https://chocolatey.org/install), a Windows Package Manager;
 2. Install [git](`https://git-scm.com/`), a Software Configuration Management (SCM).;
-3. Install [Node.js](npmjs.com/get-npm), a [Runtime system](https://en.wikipedia.org/wiki/Runtime_system);
+3. Install [Node.js](https://npmjs.com/get-npm), a [Runtime system](https://en.wikipedia.org/wiki/Runtime_system);
 4. Install Visual Studio Code Insiders, Brackets or Atom as an editor of your choice;
 5. Fork the repository by visiting https://github.com/pragmatismo-io/BotServer/fork;
 6. Clone the just forked repository by running `git clone <your-forked-repository-url>/BotServer.git`;