diff --git a/README.md b/README.md
index 697b7068..03d6ebfd 100644
--- a/README.md
+++ b/README.md
@@ -40,6 +40,12 @@ For more examples showing wiring, see each battery types own Wiki page. For inst
 2. When the Arduino IDE has been started;
 Click "File" in the upper left corner -> Preferences -> Additional Development >Board Manager URL -> Enter the URL in the input box https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json
 3. Go to "Boards Manager", and install the ESP32 package by Espressif Systems
+
+⚠️ Make sure to use the latest 2.x.x version and not a 3.x.x version, as it is not yet supported by the libraries we include with the SW!
+![image](https://github.com/dalathegreat/Battery-Emulator/assets/81711263/79602ef1-1a23-4670-a638-b896b7f6cdf6)
+
+For future migration, see this link: https://docs.espressif.com/projects/arduino-esp32/en/latest/migration_guides/2.x_to_3.0.html
+
 4. The arduino settings should be set to "ESP32 Dev Module" with the following settings;
 ![alt text](https://github.com/Xinyuan-LilyGO/T-CAN485/blob/main/img/arduino_setting.png)
 5. Select which battery type you will use, along with other optional settings. This is done in the USER_SETTINGS.h file.