diff --git a/examples/OTAUpdate/Cert.cpp b/examples/OTAUpdate/Cert.cpp
deleted file mode 100644
index 7dafa093..00000000
--- a/examples/OTAUpdate/Cert.cpp
+++ /dev/null
@@ -1,38 +0,0 @@
-#include "Cert.h"
-
-// Ref: https://projects.petrucci.ch/esp32/?page=ssl.php&url=otaupdates.sinric.pro
-
-// certificate for otaupdates.sinric.pro
-// ISRG Root X1, valid until Sat Mar 13 2027, size: 1801 bytes 
-
-const char* rootCACertificate = R"EOF(
------BEGIN CERTIFICATE-----
-MIIFBjCCAu6gAwIBAgIRAIp9PhPWLzDvI4a9KQdrNPgwDQYJKoZIhvcNAQELBQAw
-TzELMAkGA1UEBhMCVVMxKTAnBgNVBAoTIEludGVybmV0IFNlY3VyaXR5IFJlc2Vh
-cmNoIEdyb3VwMRUwEwYDVQQDEwxJU1JHIFJvb3QgWDEwHhcNMjQwMzEzMDAwMDAw
-WhcNMjcwMzEyMjM1OTU5WjAzMQswCQYDVQQGEwJVUzEWMBQGA1UEChMNTGV0J3Mg
-RW5jcnlwdDEMMAoGA1UEAxMDUjExMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIB
-CgKCAQEAuoe8XBsAOcvKCs3UZxD5ATylTqVhyybKUvsVAbe5KPUoHu0nsyQYOWcJ
-DAjs4DqwO3cOvfPlOVRBDE6uQdaZdN5R2+97/1i9qLcT9t4x1fJyyXJqC4N0lZxG
-AGQUmfOx2SLZzaiSqhwmej/+71gFewiVgdtxD4774zEJuwm+UE1fj5F2PVqdnoPy
-6cRms+EGZkNIGIBloDcYmpuEMpexsr3E+BUAnSeI++JjF5ZsmydnS8TbKF5pwnnw
-SVzgJFDhxLyhBax7QG0AtMJBP6dYuC/FXJuluwme8f7rsIU5/agK70XEeOtlKsLP
-Xzze41xNG/cLJyuqC0J3U095ah2H2QIDAQABo4H4MIH1MA4GA1UdDwEB/wQEAwIB
-hjAdBgNVHSUEFjAUBggrBgEFBQcDAgYIKwYBBQUHAwEwEgYDVR0TAQH/BAgwBgEB
-/wIBADAdBgNVHQ4EFgQUxc9GpOr0w8B6bJXELbBeki8m47kwHwYDVR0jBBgwFoAU
-ebRZ5nu25eQBc4AIiMgaWPbpm24wMgYIKwYBBQUHAQEEJjAkMCIGCCsGAQUFBzAC
-hhZodHRwOi8veDEuaS5sZW5jci5vcmcvMBMGA1UdIAQMMAowCAYGZ4EMAQIBMCcG
-A1UdHwQgMB4wHKAaoBiGFmh0dHA6Ly94MS5jLmxlbmNyLm9yZy8wDQYJKoZIhvcN
-AQELBQADggIBAE7iiV0KAxyQOND1H/lxXPjDj7I3iHpvsCUf7b632IYGjukJhM1y
-v4Hz/MrPU0jtvfZpQtSlET41yBOykh0FX+ou1Nj4ScOt9ZmWnO8m2OG0JAtIIE38
-01S0qcYhyOE2G/93ZCkXufBL713qzXnQv5C/viOykNpKqUgxdKlEC+Hi9i2DcaR1
-e9KUwQUZRhy5j/PEdEglKg3l9dtD4tuTm7kZtB8v32oOjzHTYw+7KdzdZiw/sBtn
-UfhBPORNuay4pJxmY/WrhSMdzFO2q3Gu3MUBcdo27goYKjL9CTF8j/Zz55yctUoV
-aneCWs/ajUX+HypkBTA+c8LGDLnWO2NKq0YD/pnARkAnYGPfUDoHR9gVSp/qRx+Z
-WghiDLZsMwhN1zjtSC0uBWiugF3vTNzYIEFfaPG7Ws3jDrAMMYebQ95JQ+HIBD/R
-PBuHRTBpqKlyDnkSHDHYPiNX3adPoPAcgdF3H2/W0rmoswMWgTlLn1Wu0mrks7/q
-pdWfS6PJ1jty80r2VKsM/Dj3YIDfbjXKdaFU5C+8bhfJGqU3taKauuz0wHVGT3eo
-6FlWkWYtbt4pgdamlwVeZEW+LM7qZEJEsMNPrfC03APKmZsJgpWCDWOKZvkZcvjV
-uYkQ4omYCTX5ohy+knMjdOmdH9c7SpqEWBDC86fiNex+O0XOMEZSa8DA
------END CERTIFICATE-----
-)EOF"; 
diff --git a/examples/OTAUpdate/Cert.h b/examples/OTAUpdate/Cert.h
deleted file mode 100644
index 56b76eb9..00000000
--- a/examples/OTAUpdate/Cert.h
+++ /dev/null
@@ -1,3 +0,0 @@
-#pragma once
-
-extern const char* rootCACertificate;
\ No newline at end of file
diff --git a/examples/OTAUpdate/ESP32OTAHelper.h b/examples/OTAUpdate/ESP32OTAHelper.h
index 9abcc9c9..189edec0 100644
--- a/examples/OTAUpdate/ESP32OTAHelper.h
+++ b/examples/OTAUpdate/ESP32OTAHelper.h
@@ -4,11 +4,10 @@
 #include <WiFiClientSecure.h>
 #include <HTTPClient.h>
 #include <Update.h>
-#include "Cert.h" 
 
 String startOtaUpdate(const String &url) {
     WiFiClientSecure client;
-    client.setCACert(rootCACertificate);
+    client.setInsecure();
 
     HTTPClient https;
     Serial.print("[startOtaUpdate()] begin...\n");
diff --git a/examples/OTAUpdate/ESP8266OTAHelper.h b/examples/OTAUpdate/ESP8266OTAHelper.h
index 0cb223e8..0fbd67a8 100644
--- a/examples/OTAUpdate/ESP8266OTAHelper.h
+++ b/examples/OTAUpdate/ESP8266OTAHelper.h
@@ -1,8 +1,7 @@
 #if defined(ESP8266) || defined(ARDUINO_ARCH_RP2040)
 
 #include <Arduino.h>
-#include <time.h>
-#include "Cert.h" 
+#include <time.h> 
 
 #if defined(ARDUINO_ARCH_RP2040)
   #include <HTTPClient.h>