diff --git a/platformio.ini b/platformio.ini
index 9424999..981737b 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -46,7 +46,7 @@ upload_resetmethod = ${common.upload_resetmethod}
 lib_deps =
   WiFiManager@0.14
   AsyncMqttClient
-  https://github.com/bblanchon/ArduinoJson.git#v6.1.0-beta
+  https://github.com/bblanchon/ArduinoJson.git#v6.4.0-beta
   WS2812FX
   https://github.com/debsahu/NeoAnimationFX
   NeoPixelBus