diff --git a/README.md b/README.md
index 4e8f1756..dd40297f 100644
--- a/README.md
+++ b/README.md
@@ -1,9 +1,11 @@
-# Overview
+> **Warning** If you are using BlueOS, please follow the [new documentation](https://blueos.cloud/docs).
 
-> **Note** The information in this guide applies to ArduSub V3.5 and up. If you are running an older version, you should [update](/quick-start/installing-ardusub.md).
+# Overview
 
 ## ArduSub and the ArduPilot Project
 
+> **Note** The information in this guide applies to ArduSub V3.5 and up. If you are running an older version, you should [update](/quick-start/installing-ardusub.md).
+
 The ArduSub project is a fully-featured open-source solution for remotely operated underwater vehicles (ROVs) and autonomous underwater vehicles (AUVs). ArduSub is a part of the [ArduPilot project](http://ardupilot.org/), and was originally derived from the ArduCopter code. ArduSub has extensive capabilities out of the box including feedback stability control, depth and heading hold, and autonomous navigation.
 
 ArduSub is designed to be safe, feature-rich, open-ended, and easy to use even for novice users.
diff --git a/quick-start/installing-companion.md b/quick-start/installing-companion.md
index 17bd2825..05221bf8 100644
--- a/quick-start/installing-companion.md
+++ b/quick-start/installing-companion.md
@@ -1,5 +1,8 @@
+> **Warning** If you are using BlueOS, please follow the [new documentation](https://blueos.cloud/docs).
+
 # Installing the Companion Computer Software Image
 
+## SD card
 >**Note** The current version of Companion is **v0.0.31**. If your system is out of date you can update by either installing a fresh image with the instructions below or connecting to Wi-Fi and performing a [Software Update](#software-update).
 
 The operating system and supporting software is installed by writing a pre-configured `.img` file to an SD Card which is then inserted into the Companion Computer (Raspberry Pi).