diff --git a/board/TencentOS_Tiny_EVB_MX_Plus/KEIL/mqttclient_iot_explorer/demo/mqttclient_iot_explorer.c b/board/TencentOS_Tiny_EVB_MX_Plus/KEIL/mqttclient_iot_explorer/demo/mqttclient_iot_explorer.c
index 0f9c8cac..cf0c0bb9 100644
--- a/board/TencentOS_Tiny_EVB_MX_Plus/KEIL/mqttclient_iot_explorer/demo/mqttclient_iot_explorer.c
+++ b/board/TencentOS_Tiny_EVB_MX_Plus/KEIL/mqttclient_iot_explorer/demo/mqttclient_iot_explorer.c
@@ -2,7 +2,7 @@
 #include "mcu_init.h"
 #include "tos_k.h"
 #include "mqttclient.h"
-#include "cjson.h"
+#include "cJSON.h"
 #include "sal_module_wrapper.h"
 
 #define USE_ESP8266
diff --git a/board/TencentOS_tiny_EVB_AIoT/mqttclient_iot_explorer/mqttclient_iot_explorer.c b/board/TencentOS_tiny_EVB_AIoT/mqttclient_iot_explorer/mqttclient_iot_explorer.c
index 2fa37620..d7e19903 100644
--- a/board/TencentOS_tiny_EVB_AIoT/mqttclient_iot_explorer/mqttclient_iot_explorer.c
+++ b/board/TencentOS_tiny_EVB_AIoT/mqttclient_iot_explorer/mqttclient_iot_explorer.c
@@ -1,7 +1,7 @@
 #include "mcu_init.h"
 #include "tos_k.h"
 #include "mqttclient.h"
-#include "cjson.h"
+#include "cJSON.h"
 #include "sal_module_wrapper.h"
 
 #define USE_ESP8266
diff --git a/board/TencentOS_tiny_EVB_AIoT/mqttclient_iot_explorer_bh1750/mqttclient_iot_explorer_bh1750.c b/board/TencentOS_tiny_EVB_AIoT/mqttclient_iot_explorer_bh1750/mqttclient_iot_explorer_bh1750.c
index 6bed4223..8bfd5d8f 100644
--- a/board/TencentOS_tiny_EVB_AIoT/mqttclient_iot_explorer_bh1750/mqttclient_iot_explorer_bh1750.c
+++ b/board/TencentOS_tiny_EVB_AIoT/mqttclient_iot_explorer_bh1750/mqttclient_iot_explorer_bh1750.c
@@ -1,7 +1,7 @@
 #include "mcu_init.h"
 #include "tos_k.h"
 #include "mqttclient.h"
-#include "cjson.h"
+#include "cJSON.h"
 #include "sal_module_wrapper.h"
 #include "bh1750_i2c_drv.h"
 
diff --git a/board/TencentOS_tiny_STM32H750/KEIL/mqtt_client_iot_exporer/demo/mqttclient_iot_explorer.c b/board/TencentOS_tiny_STM32H750/KEIL/mqtt_client_iot_exporer/demo/mqttclient_iot_explorer.c
index 029f1a56..cefef08a 100644
--- a/board/TencentOS_tiny_STM32H750/KEIL/mqtt_client_iot_exporer/demo/mqttclient_iot_explorer.c
+++ b/board/TencentOS_tiny_STM32H750/KEIL/mqtt_client_iot_exporer/demo/mqttclient_iot_explorer.c
@@ -2,7 +2,7 @@
 #include "mcu_init.h"
 #include "tos_k.h"
 #include "mqttclient.h"
-#include "cjson.h"
+#include "cJSON.h"
 #include "sal_module_wrapper.h"
 
 #define USE_ESP8266
diff --git a/examples/mqttclient_iot_explorer/mqttclient_iot_explorer.c b/examples/mqttclient_iot_explorer/mqttclient_iot_explorer.c
index a22dc8f3..271a6d6e 100644
--- a/examples/mqttclient_iot_explorer/mqttclient_iot_explorer.c
+++ b/examples/mqttclient_iot_explorer/mqttclient_iot_explorer.c
@@ -1,7 +1,7 @@
 #include "mcu_init.h"
 #include "tos_k.h"
 #include "mqttclient.h"
-#include "cjson.h"
+#include "cJSON.h"
 #include "sal_module_wrapper.h"
 
 #define USE_ESP8266