diff --git a/docs/img/QmodMaster.png b/docs/img/QmodMaster.png
deleted file mode 100644
index 53bdc92..0000000
Binary files a/docs/img/QmodMaster.png and /dev/null differ
diff --git a/docs/modbus_tcp.md b/docs/modbus_tcp.md
index cb0a45c..04d440e 100644
--- a/docs/modbus_tcp.md
+++ b/docs/modbus_tcp.md
@@ -14,4 +14,4 @@ modbus_init();
 ```
 ## Usage
 
-![QmodMaster.exe](./img/QmodMaster.png)
\ No newline at end of file
+![QmodMaster.exe](./img/QmodMaster.jpg)
\ No newline at end of file