diff --git a/OBI-Socket-2.md b/OBI-Socket-2.md
index 15590ed0..a3eaf82b 100644
--- a/OBI-Socket-2.md
+++ b/OBI-Socket-2.md
@@ -12,7 +12,7 @@ The only way to flashing the modul you must soldering 3 wires to the RX/TX/GND p
 **_!!! Don't flashing the modul when it connected to the main power. You brick the device and your computer or USB Port. Use only a 3.3V USB Adapter for flashing!!!_**
 
 ***
-## PCB serial Pinouts
+## PCB serial pinouts
 ![PCB](https://user-images.githubusercontent.com/43306023/49151886-7e137c80-f311-11e8-99d6-c51c55699d9d.JPG)
 
 ## WebIf configuration