diff --git a/_Sidebar.md b/_Sidebar.md
index 2c314556..f1e50ea4 100644
--- a/_Sidebar.md
+++ b/_Sidebar.md
@@ -55,6 +55,7 @@
 - [**Sonoff iFan02**](Sonoff-iFan02)
 - [**Sonoff SC**](Sonoff-SC)
 - [**Sonoff PSA**](Sonoff-PSA)
+- [**Sonoff S31**](Sonoff-S31)
 - [**Shelly 1 and 2**](Shelly-1-and-2)
 - [**Wemos D1 R1 & R2**](https://github.com/arendst/Sonoff-Tasmota/wiki/Wemos-D1-R1-&-R2)
 - [**Wemos D1 Mini**](https://github.com/arendst/Sonoff-Tasmota/wiki/Wemos%20D1%20Mini)