diff --git a/M5StickCPlus_FactoryTest2022.ino b/M5StickCPlus_FactoryTest2022.ino
index 963e06e..9dbd118 100644
--- a/M5StickCPlus_FactoryTest2022.ino
+++ b/M5StickCPlus_FactoryTest2022.ino
@@ -1591,7 +1591,7 @@
 
 #ifdef ENABLE_OTA
 const char *ssid = "miura2g";
-const char *password = "jikken2022";
+const char *password = "jikken2024";
 void OTA_Setup()
 {
     WiFi.softAPdisconnect(true);
diff --git a/SampleSrc/httpclient01.ino b/SampleSrc/httpclient01.ino
index 3fcdb90..b0e050b 100644
--- a/SampleSrc/httpclient01.ino
+++ b/SampleSrc/httpclient01.ino
@@ -3,7 +3,7 @@
 #include <HTTPClient.h> // ステータスコードの定義もここにある
 
 const char* ssid = "miura2g";
-const char* password = "jikken2022";
+const char* password = "jikken2024";
 
 
 void setup() {
diff --git a/SampleSrc/httpserver01.ino b/SampleSrc/httpserver01.ino
index c1534e9..354375f 100644
--- a/SampleSrc/httpserver01.ino
+++ b/SampleSrc/httpserver01.ino
@@ -1,7 +1,7 @@
 #include <WiFi.h>
 
 const char* ssid = "miura2g";
-const char* password = "jikken2022";
+const char* password = "jikken2024";
 
 WiFiServer server(80);
 
diff --git a/SampleSrc/line01.ino b/SampleSrc/line01.ino
index 613da6f..edfe943 100644
--- a/SampleSrc/line01.ino
+++ b/SampleSrc/line01.ino
@@ -8,7 +8,7 @@
 void setup() {
   Serial.begin(115200);
   WiFi.mode(WIFI_STA);
-  WiFiMulti.addAP("miura2g", "jikken2022");
+  WiFiMulti.addAP("miura2g", "jikken2024");
 
   // wait for WiFi connection
   Serial.print("Waiting for WiFi to connect...");
diff --git a/SampleSrc/mqtt01pub.ino b/SampleSrc/mqtt01pub.ino
index eeb2724..16f94f4 100644
--- a/SampleSrc/mqtt01pub.ino
+++ b/SampleSrc/mqtt01pub.ino
@@ -5,7 +5,7 @@
 #include <PubSubClient.h>
 
 const char* ssid = "miura2g";
-const char* password = "jikken2022";
+const char* password = "jikken2024";
 
 const char* server = "192.168.11.11"; // "mqtt.istlab.info";
 const int   port     = 1883;                   // 注：学内ネットワークはポート制限あり。
diff --git a/SampleSrc/mqtt01sub.ino b/SampleSrc/mqtt01sub.ino
index 2e852a2..9541bc8 100644
--- a/SampleSrc/mqtt01sub.ino
+++ b/SampleSrc/mqtt01sub.ino
@@ -8,7 +8,7 @@
 #include <ArduinoJson.h>
 
 const char* ssid = "miura2g";
-const char* password = "jikken2022";
+const char* password = "jikken2024";
 
 const char* server = "192.168.11.11"; // "mqtt.istlab.info";
 const int   port     = 1883;                   // 注：学内ネットワークはポート制限あり。
diff --git a/SampleSrc/ntp01.ino b/SampleSrc/ntp01.ino
index aef14b7..05b59d7 100644
--- a/SampleSrc/ntp01.ino
+++ b/SampleSrc/ntp01.ino
@@ -1,7 +1,7 @@
 #include <WiFi.h>
 
 const char* ssid = "miura2g";
-const char* password = "jikken2022";
+const char* password = "jikken2024";
 
 void setup() {
   Serial.begin(115200);
diff --git a/SampleSrc/ota01.ino b/SampleSrc/ota01.ino
index 70afdba..605c071 100644
--- a/SampleSrc/ota01.ino
+++ b/SampleSrc/ota01.ino
@@ -3,7 +3,7 @@
 #include <ArduinoOTA.h>
 
 const char *ssid = "miura2g";
-const char *password = "jikken2022";
+const char *password = "jikken2024";
 
 void setup()
 {
diff --git a/SampleSrc/rtc01.ino b/SampleSrc/rtc01.ino
index 53b3b18..64d4f2b 100644
--- a/SampleSrc/rtc01.ino
+++ b/SampleSrc/rtc01.ino
@@ -36,7 +36,7 @@
   
   if (USE_NTP) {
     const char* ssid = "miura2g";
-    const char* password = "jikken2022";
+    const char* password = "jikken2024";
     const char* ntpserver = "192.168.11.11"; // or ntp.nict.jp"; // or 10.64.7.184 for CIT-ap1x
     WiFi.begin(ssid, password);
     while (WiFi.status() != WL_CONNECTED) { // 接続中...
diff --git a/SampleSrc/telnet01.ino b/SampleSrc/telnet01.ino
index 3b896bc..be33c26 100644
--- a/SampleSrc/telnet01.ino
+++ b/SampleSrc/telnet01.ino
@@ -27,7 +27,7 @@
 //how many clients should be able to telnet to this ESP32
 #define MAX_SRV_CLIENTS 3
 const char* ssid = "miura2g";
-const char* password = "jikken2022";
+const char* password = "jikken2024";
 
 WiFiServer server(23);
 WiFiClient serverClients[MAX_SRV_CLIENTS];
diff --git a/SampleSrc/wifi01.ino b/SampleSrc/wifi01.ino
index efd2ef8..7f6ef56 100644
--- a/SampleSrc/wifi01.ino
+++ b/SampleSrc/wifi01.ino
@@ -2,7 +2,7 @@
 #include <WiFi.h>
 
 const char* ssid = "miura2g";
-const char* password = "jikken2022";
+const char* password = "jikken2024";
 
 void setup() {
   M5.begin();
diff --git a/SampleSrc/wifimac.ino b/SampleSrc/wifimac.ino
index e32b0cd..a6e3fd2 100644
--- a/SampleSrc/wifimac.ino
+++ b/SampleSrc/wifimac.ino
@@ -2,7 +2,7 @@
 #include <WiFi.h>
 
 const char *ssid = "miura2g";
-const char *password = "jikken2022";
+const char *password = "jikken2024";
 
 void setup()
 {
diff --git a/wifi.ino b/wifi.ino
index 1ab4623..0d50068 100644
--- a/wifi.ino
+++ b/wifi.ino
@@ -2,7 +2,7 @@
 #include <WiFi.h>
 
 const char *ssid = "miura2g"; // 802.11b/g (2.4GHz)only. 5GHz is not supported.
-const char *password = "jikken2022";
+const char *password = "jikken2024";
 
 // const char *ntpserver = "192.168.11.11"; //実験室ローカルNTPサーバ
 const char *ntpserver = "ntp.nict.jp";