diff --git a/bin/device-install.bat b/bin/device-install.bat
index db48d30cd..4837d61b1 100644
--- a/bin/device-install.bat
+++ b/bin/device-install.bat
@@ -30,7 +30,9 @@ IF EXIST %FILENAME% (
     echo Trying to flash update %FILENAME%, but first erasing and writing system information"
 	%PYTHON% -m esptool --baud 921600 erase_flash
 	%PYTHON% -m esptool --baud 921600 write_flash 0x1000 system-info.bin
-	%PYTHON% -m esptool --baud 921600 write_flash 0x00390000 spiffs-*.bin
+    for %%f in (spiffs-*.bin) do (
+        %PYTHON% -m esptool --baud 921600 write_flash 0x00390000 %%f
+    )
 	%PYTHON% -m esptool --baud 921600 write_flash 0x10000 %FILENAME%
 ) else (
     echo "Invalid file: %FILENAME%"