diff --git a/docs/en/product_documents/m5stack-core/m5core_basic.md b/docs/en/product_documents/m5stack-core/m5core_basic.md
index 65335e6e..8bf330fa 100644
--- a/docs/en/product_documents/m5stack-core/m5core_basic.md
+++ b/docs/en/product_documents/m5stack-core/m5core_basic.md
@@ -175,11 +175,11 @@ The a Bottom board on the back of M5Core. It's designed for expanding gpio on M-
 -  Type-C USB Cable
 -  User Manual
 
-<img src="assets/img/product_pics/core/basic/basic_06.jpg" width="250" height="250"> <img src="assets/img/product_pics/core/basic/basic_07.jpg" width="250" height="250">
+<img src="assets/img/product_pics/core/basic/basic_06.JPG" width="250" height="250"> <img src="assets/img/product_pics/core/basic/basic_07.JPG" width="250" height="250">
 
-<img src="assets/img/product_pics/core/basic/basic_08.jpg" width="250" height="250"> <img src="assets/img/product_pics/core/basic/basic_09.jpg" width="250" height="250">
+<img src="assets/img/product_pics/core/basic/basic_08.JPG" width="250" height="250"> <img src="assets/img/product_pics/core/basic/basic_09.JPG" width="250" height="250">
 
-<img src="assets/img/product_pics/core/basic/basic_10.jpg" width="50%" height="50%">
+<img src="assets/img/product_pics/core/basic/basic_10.JPG" width="50%" height="50%">
 
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