diff --git a/platformio.ini b/platformio.ini
index c7855bb4..2b7de9c0 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -67,7 +67,7 @@ build_flags =
 ; Warning : don't put comments after github links => causes infinite download loop
 lib_deps =
     bxparks/AceButton@^1.9.0         ; GPIO button library
-    bblanchon/ArduinoJson@^6.18.1    ; Json(l) parser
+    bblanchon/ArduinoJson@^6.18.3    ; Json(l) parser
     bblanchon/StreamUtils@1.6.1      ; for EEPromStream
     knolleary/PubSubClient@^2.8.0    ; MQTT client
     git+https://github.com/fvanroie/ConsoleInput.git