diff --git a/docs/information/groups.md b/docs/information/groups.md
index c04449166..f5a541699 100644
--- a/docs/information/groups.md
+++ b/docs/information/groups.md
@@ -3,7 +3,7 @@
 
 Zigbee2mqtt has support for Zigbee groups. By using Zigbee groups you can control multiple devices simultaneously with one command.
 
-**NOTE:** to use groups, at least firmware version `20181224` is required! (available [here](https://github.com/Koenkk/Z-Stack-firmware/tree/dev/coordinator))
+**NOTE:** to use groups, at least firmware version `20181224` is required! (available [here](https://github.com/Koenkk/Z-Stack-firmware/tree/master/coordinator))
 
 ## Configuration
 Add the following to your `configuration.yaml`.