diff --git a/src/platformio.ini b/src/platformio.ini
index c5df5512..ffdbd1f7 100644
--- a/src/platformio.ini
+++ b/src/platformio.ini
@@ -30,7 +30,7 @@ lib_deps =
     https://github.com/nRF24/RF24.git#v1.4.8
     paulstoffregen/Time @ ^1.6.1
     https://github.com/bertmelis/espMqttClient#v1.7.0
-    bblanchon/ArduinoJson @ ^6.21.3
+    bblanchon/ArduinoJson @ ^6.21.5
     https://github.com/JChristensen/Timezone @ ^1.2.4
     olikraus/U8g2 @ ^2.35.9
     https://github.com/zinggjm/GxEPD2#1.5.3