diff --git a/3rd-Party-Modules.md b/3rd-Party-Modules.md
index 01c9352..fe3ad06 100644
--- a/3rd-Party-Modules.md
+++ b/3rd-Party-Modules.md
@@ -573,6 +573,7 @@ The following modules are created by their respective authors.
 |[MMM-LocalVideoPlayer](https://github.com/RayTCosgrove/MMM-LocalVideoPlayer)|RayTCosgrove|A lightweight local video player for Magic Mirror.|
 |[MMM-Loxone](https://github.com/idoodler/MMM-Loxone) | idoodler| MMM-Loxone connects to your Loxone Miniserver and lets it communicate to your MagicMirror². |
 |[MMM-Mashie-Skolmat](https://github.com/Alvinger/MMM-Mashie-Skolmat) |Alvinger|Show school lunch menus from Mashie.com. (based on MMM-Skolmaten with different source for menus)|
+|[MMM-Mattermost](https://github.com/O5ten/MMM-Mattermost) |O5ten|Show specific messages from mattermost chat. (Similar to MMM-SlackAnnouncements, but not bound to a specific channel)
 |[MMM-max](https://github.com/mirko3000/MMM-max) |mirko3000 |Displays the status of you MAX! radiator thermostats via the MAX! cube gateway.|
 |[MMM-MicrosoftToDo](https://github.com/thobach/MMM-MicrosoftToDo/) |thobach |Displays your Microsoft To Do tasks on your mirror.|
 |[MMM-MieleAtHome](https://github.com/SAR71/MMM-MieleAtHome/) |ViDiBi |Displays the status of you Miele@Home Devices.|