diff --git a/README.md b/README.md
index 294072e..5f850e7 100644
--- a/README.md
+++ b/README.md
@@ -44,4 +44,4 @@ By default the LCD is initialized as 2-lines, 5x8 dots, no cursor or blinking.
 To display text on line 1, select the I²C to HD44780 adapter I²C slave, write 1 followed by the ASCII text.
 To display text on line 2, select the I²C to HD44780 adapter I²C slave, write 2 followed by the ASCII text.
 In case the display is in a very weird state and does not update text, you can re-initialize it by writing 0 after selecting it.
-More commands are described in the firmware.
+More commands are described in the [firmware](https://git.cuvoodoo.info/kingkevin/stm8s/src/branch/i2c_hd44780).