diff --git a/README.md b/README.md
index 20678fc..5358544 100644
--- a/README.md
+++ b/README.md
@@ -81,7 +81,7 @@ LPS22HB sensor is used with SPI interface.
 # External temperature sensor
 A NTC is used for external temperature measuring with addable resistors, the schematic looks like this:
 
-![alt text](https://github.com/sq2ips/m20-custom-firmware/blob/main/img/NTC.png?raw=true)
+![alt text](https://github.com/sq2ips/m20-custom-firmware/blob/main/img/NTC.jpg?raw=true)
 
 # Radio
 TODO