diff --git a/ESP32_AP-Flasher/platformio.ini b/ESP32_AP-Flasher/platformio.ini
index f9866c72..cf3f3b89 100644
--- a/ESP32_AP-Flasher/platformio.ini
+++ b/ESP32_AP-Flasher/platformio.ini
@@ -13,7 +13,7 @@ platform = espressif32
 framework = arduino
 lib_deps = 
 	https://github.com/me-no-dev/ESPAsyncWebServer
-	bblanchon/ArduinoJson
+	bblanchon/ArduinoJson@^6.19.4
 	bodmer/TFT_eSPI
 	https://github.com/Bodmer/TJpg_Decoder.git
 	https://github.com/garretlab/shoddyxml2