diff --git a/README.md b/README.md
index 25873a1..563f075 100644
--- a/README.md
+++ b/README.md
@@ -65,7 +65,7 @@ About J305 Tube conversion factor, you can read intresting article on: https://i
 ### 3D Printed case
 
 <img src="assets/bottom1.png" width="600"><br>
-<img src="assets/case1.PNG" width="600">
+<img src="assets/case1.png" width="600">
 
 ### Resources
 - https://iot-devices.com.ua/