diff --git a/platformio.ini b/platformio.ini
index b609470..0e76a1a 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -1,4 +1,5 @@
-; PlatformIO Project Configuration File
+; esp_jardin — station de monitoring jardin, ESP32 + 3× DS18B20
+; WiFi hybride STA/AP, interface web WebSocket, API REST, MQTT avec deadband
 [env:esp32dev]
 platform = espressif32
 board = esp32dev
@@ -11,6 +12,6 @@ lib_deps =
     paulstoffregen/OneWire @ ^2.3.7
     milesburton/DallasTemperature @ ^3.11.0
     knolleary/PubSubClient @ ^2.8
-    bblanchon/ArduinoJson @ ^7
+    bblanchon/ArduinoJson @ ^7.2
 
 upload_flags = --auth=Jardin2026