diff --git a/README.md b/README.md
index 8dfaf490..30b8fd9f 100644
--- a/README.md
+++ b/README.md
@@ -132,7 +132,7 @@ Before you begin we recommend you read about the basic building blocks that asse
 Make sure you have installed all of the following prerequisites on your development machine:
 * Git - [Download & Install Git](https://git-scm.com/downloads). OSX and Linux machines typically have this already installed.
 * Node.js - [Download & Install Node.js](https://nodejs.org/en/download/) and the npm package manager. If you encounter any problems, you can also use this [GitHub Gist](https://gist.github.com/isaacs/579814) to install Node.js.
-* MongoDB - [Download & Install MongoDB](http://www.mongodb.org/downloads), and make sure it's running on the default port (27017).
+* MongoDB - [Download & Install MongoDB](http://www.mongodb.org/downloads), at least version 3.4 is required, and make sure it's running on the default port (27017).
 * Bower - You're going to use the [Bower Package Manager](http://bower.io/) to manage your front-end packages. Make sure you've installed Node.js and npm first, then install bower globally using npm:
 
 ```bash