diff --git a/README.md b/README.md
index d5c35d5..afb4551 100644
--- a/README.md
+++ b/README.md
@@ -35,7 +35,7 @@ to have a **LOW** or **HIGH** digital value in the corresponding circuit.
 
 The next image shows the connection for the circuits on the Atlas Scientific board.
 
-![enable_pins_3](28.png)
+![enable_pins_3](28.jpg)
 
 According with the image, from left to right, we have the yellow circuit for dissolved oxygen, then the blue circuit 
 for ORP, the black circuit for temperature, and the green one goes for conductivity. Therefore, if it is neccessary