diff --git a/.config.sh b/.config.sh
index ff27022d..ec5d93b3 100755
--- a/.config.sh
+++ b/.config.sh
@@ -302,7 +302,7 @@ IOTA_JSON_AUTOCAST=true
 IOTA_JSON_LOG_LEVEL=INFO
 
 # Docker image for IoT Agent for JSON
-IMAGE_IOTAGENT_JSON=telefonicaiot/iotagent-json:2.4.2
+IMAGE_IOTAGENT_JSON=telefonicaiot/iotagent-json:3.4.0
 
 #
 # Node-RED
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 22463556..b9018ef2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,6 @@
 ## FIWARE Big Bang v0.37.0-next
 
+-   Update IoT Agent for JSON to 3.4.0 (#371)
 -   Update IoT Agent for UltraLight to 3.4.0 (#370)
 -   Update STH Comet to 2.11.0 (#369)
 -   Improve maintenance script (#368)
diff --git a/config.sh b/config.sh
index ff27022d..ec5d93b3 100755
--- a/config.sh
+++ b/config.sh
@@ -302,7 +302,7 @@ IOTA_JSON_AUTOCAST=true
 IOTA_JSON_LOG_LEVEL=INFO
 
 # Docker image for IoT Agent for JSON
-IMAGE_IOTAGENT_JSON=telefonicaiot/iotagent-json:2.4.2
+IMAGE_IOTAGENT_JSON=telefonicaiot/iotagent-json:3.4.0
 
 #
 # Node-RED
diff --git a/docs/en/examples/iotagent-json.md b/docs/en/examples/iotagent-json.md
index e027cc33..a9a2cbd9 100644
--- a/docs/en/examples/iotagent-json.md
+++ b/docs/en/examples/iotagent-json.md
@@ -110,6 +110,7 @@ ngsi devices \
   "devices": [
     {
       "device_id":   "sensor002",
+      "apikey":      "SMoCnNjlrAfeFOtlaC8XAhM8o1",
       "entity_name": "urn:ngsi-ld:WeatherObserved:sensor002",
       "entity_type": "Sensor",
       "timezone":    "Asia/Tokyo",
@@ -361,6 +362,7 @@ ngsi devices \
   "devices": [
     {
       "device_id":   "sensor004",
+      "apikey":      "XaEMQ86tTBHCwN0C9MjiHXcYFX",
       "entity_name": "urn:ngsi-ld:WeatherObserved:sensor004",
       "entity_type": "Sensor",
       "timezone":    "Asia/Tokyo",
diff --git a/docs/ja/examples/iotagent-json.md b/docs/ja/examples/iotagent-json.md
index 1bd1e0c0..2f20780f 100644
--- a/docs/ja/examples/iotagent-json.md
+++ b/docs/ja/examples/iotagent-json.md
@@ -120,6 +120,7 @@ ngsi devices \
   "devices": [
     {
       "device_id":   "sensor002",
+      "apikey":      "SMoCnNjlrAfeFOtlaC8XAhM8o1",
       "entity_name": "urn:ngsi-ld:WeatherObserved:sensor002",
       "entity_type": "Sensor",
       "timezone":    "Asia/Tokyo",
@@ -387,6 +388,7 @@ ngsi devices \
   "devices": [
     {
       "device_id":   "sensor004",
+      "apikey":      "XaEMQ86tTBHCwN0C9MjiHXcYFX",
       "entity_name": "urn:ngsi-ld:WeatherObserved:sensor004",
       "entity_type": "Sensor",
       "timezone":    "Asia/Tokyo",
diff --git a/examples/iotagent-json-http/03.create-deivce.sh b/examples/iotagent-json-http/03.create-deivce.sh
index 84d77786..464ce1cb 100755
--- a/examples/iotagent-json-http/03.create-deivce.sh
+++ b/examples/iotagent-json-http/03.create-deivce.sh
@@ -20,6 +20,7 @@ ngsi devices --host "${IOTAGENT_JSON}" create --data '{
  "devices": [
    {
      "device_id":   "sensor004",
+     "apikey":      "XaEMQ86tTBHCwN0C9MjiHXcYFX",
      "entity_name": "urn:ngsi-ld:WeatherObserved:sensor004",
      "entity_type": "Sensor",
      "timezone":    "Asia/Tokyo",
diff --git a/examples/iotagent-json-mqtt/03.create-deivce.sh b/examples/iotagent-json-mqtt/03.create-deivce.sh
index 077eb723..c8a5582d 100755
--- a/examples/iotagent-json-mqtt/03.create-deivce.sh
+++ b/examples/iotagent-json-mqtt/03.create-deivce.sh
@@ -20,6 +20,7 @@ ngsi devices --host "${IOTAGENT_JSON}" create --data '{
  "devices": [
    {
      "device_id":   "sensor002",
+     "apikey":      "SMoCnNjlrAfeFOtlaC8XAhM8o1",
      "entity_name": "urn:ngsi-ld:WeatherObserved:sensor002",
      "entity_type": "Sensor",
      "timezone":    "Asia/Tokyo",