From 4faeed2857b80b2c3335eda524ba03f5c3c8426d Mon Sep 17 00:00:00 2001
From: Jeffrey Morgan <jeffdm@users.noreply.github.com>
Date: Wed, 21 Oct 2015 20:38:00 -0700
Subject: [PATCH] Update CONTRIBUTING.md

---
 CONTRIBUTING.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 3c66fc5b7c..b0f5f7ef6b 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -19,6 +19,7 @@ Before you file an issue or a pull request, read the following tips on how to ke
 
 ### Prerequisites for developing Kitematic on Mac 
 You will need to install: 
+- The [Docker Toolbox](https://docker.com/toolbox)
 -  [Node.js 0.10.38](https://nodejs.org/dist/v0.10.38/)
 - The latest Xcode from the Apple App Store.