diff --git a/README.md b/README.md
index ae1f080..c3a4ad9 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@ and uploads the image to ESP32 flash memory.
 
 ## Installation
 
-- Make sure you use one of the supported versions of Arduino IDE and have ESP32 core installed.
+- Make sure you use one of the supported versions of Arduino IDE v1 (not the new Arduino IDE v2) and have ESP32 core installed.
 - Download the tool archive from [releases page](https://github.com/me-no-dev/arduino-esp32fs-plugin/releases/latest).
 - In your Arduino sketchbook directory, create tools directory if it doesn't exist yet.
 - Unpack the tool into tools directory (the path will look like ```<home_dir>/Arduino/tools/ESP32FS/tool/esp32fs.jar```).