diff --git a/esphome/components/json/__init__.py b/esphome/components/json/__init__.py
index 28fdcd41ef..3cb89a6cd9 100644
--- a/esphome/components/json/__init__.py
+++ b/esphome/components/json/__init__.py
@@ -15,8 +15,8 @@ async def to_code(config):
     if CORE.is_esp32:
         from esphome.components.esp32 import add_idf_component
 
-        add_idf_component(name="bblanchon/arduinojson", ref="7.4.2")
+        add_idf_component(name="bblanchon/arduinojson", ref="7.4.3")
     else:
-        cg.add_library("bblanchon/ArduinoJson", "7.4.2")
+        cg.add_library("bblanchon/ArduinoJson", "7.4.3")
     cg.add_define("USE_JSON")
     cg.add_global(json_ns.using)
diff --git a/esphome/idf_component.yml b/esphome/idf_component.yml
index b3b670d77b..f8f3df57cd 100644
--- a/esphome/idf_component.yml
+++ b/esphome/idf_component.yml
@@ -1,6 +1,6 @@
 dependencies:
   bblanchon/arduinojson:
-    version: "7.4.2"
+    version: "7.4.3"
   esphome/dlms_parser:
     version: 1.1.0
   esphome/esp-audio-libs:
diff --git a/platformio.ini b/platformio.ini
index 862b7a7dbe..43a7474d35 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -104,7 +104,7 @@ build_unflags =
 [common:idf-component-libs]
 lib_deps =
     esphome/dlms_parser@1.1.0             ; dlms_meter
-    bblanchon/ArduinoJson@7.4.2           ; json
+    bblanchon/ArduinoJson@7.4.3           ; json
     lvgl/lvgl@9.5.0                       ; lvgl
 
 ; This are common settings for the ESP8266 using Arduino.