diff --git a/Documentation/Flashing.md b/Documentation/Flashing.md
index 0b8424a3..b2f0edc0 100644
--- a/Documentation/Flashing.md
+++ b/Documentation/Flashing.md
@@ -95,6 +95,7 @@ It is recommended to use the [Pine64 Updater](https://github.com/pine64/pinecil-
 If your OS is not currently supported by the [Updater](https://github.com/pine64/pinecil-firmware-updater/releases) or it does not meet your needs, the below manual method may be used. You will need to connect your Pinecil to a computer usinga USB cable. Generally all usb controllers work, but some hubs have issues so it is recommended to connect directly and avoid USB hubs.
 
 ### Steps
+<div role="note" class="template-box" style="display: table; min-width: 16em; min-height: 1.6em; margin: .5em 0 1em; padding: .5em 1em; border: 1px solid #d33; color: black; background-color: #fee7e6;"><strong>Warning:</strong> Do not have a barrel jack PSU plugged in at the same time as a USB-C cable. Doing this will severely damage your computer, or Type-C PSU.</div>
 
    1. Never have DC power plugged into Pinecil when you are updating firmware, only use a USB-C cable or you may destroy something.
    2. Download and extract the firmware package from Github [IronOS Releases](https://github.com/Ralim/IronOS/releases)