diff --git a/ESP8266/ESP8266.ino b/ESP8266/ESP8266.ino
index 2d37426..3cde5bb 100644
--- a/ESP8266/ESP8266.ino
+++ b/ESP8266/ESP8266.ino
@@ -7,7 +7,7 @@
 // ================================================================
 //  OTA CONFIG
 // ================================================================
-#define FW_VERSION   11
+#define FW_VERSION   12
 #define GITEA_HOST   "https://git.nacho.myds.me"
 #define GITEA_OWNER  "Natxo"
 #define GITEA_REPO   "Arduino-Car"
@@ -64,11 +64,12 @@ static void checkOTA() {
   // ── Bloque de scope: libera el cliente BearSSL antes de la descarga ──
   // BearSSL ocupa ~20KB de heap. Si los dos clientes coexisten el heap
   // se agota y ESPhttpUpdate falla silenciosamente.
+  // Scope block: destruye el cliente BearSSL antes de crear el de descarga
+  // Libera ~20KB de heap (BearSSL con buffers por defecto) para la descarga
   int remoteVer = 0;
   {
     BearSSL::WiFiClientSecure client;
     client.setInsecure();
-    client.setBufferSizes(512, 512);   // buffers mínimos — suficiente para la respuesta
     HTTPClient http;
     http.begin(client, base + "version.txt" + token);
     http.setTimeout(10000);
@@ -79,7 +80,7 @@ static void checkOTA() {
       remoteVer = body.toInt();
     }
     http.end();
-  }  // ← client y http se destruyen aquí, ~20KB liberados
+  }  // client destruido aquí — heap recuperado
 
   if (remoteVer > FW_VERSION) {
     // 4 pitidos = ESP8266 actualizando
@@ -99,10 +100,6 @@ static void checkOTA() {
 
     BearSSL::WiFiClientSecure updateClient;
     updateClient.setInsecure();
-    // 4096 bytes de entrada: necesario para records TLS de datos grandes.
-    // 512 bytes de salida: suficiente para peticiones HTTP.
-    // El scope block anterior liberó ~10KB del primer cliente — hay heap.
-    updateClient.setBufferSizes(4096, 512);
     ESPhttpUpdate.setFollowRedirects(HTTPC_STRICT_FOLLOW_REDIRECTS);
     ESPhttpUpdate.rebootOnUpdate(true);
     ESPhttpUpdate.update(updateClient, base + "firmware.bin" + token);
diff --git a/Esp32Cam/Esp32Cam.ino b/Esp32Cam/Esp32Cam.ino
index 588e836..4813714 100644
--- a/Esp32Cam/Esp32Cam.ino
+++ b/Esp32Cam/Esp32Cam.ino
@@ -10,7 +10,7 @@
 // ================================================================
 //  OTA CONFIG
 // ================================================================
-#define FW_VERSION   11
+#define FW_VERSION   12
 #define GITEA_HOST   "https://git.nacho.myds.me"
 #define GITEA_OWNER  "Natxo"
 #define GITEA_REPO   "Arduino-Car"
diff --git a/firmware/esp32cam/firmware.bin b/firmware/esp32cam/firmware.bin
index fb07ea0..462c816 100644
Binary files a/firmware/esp32cam/firmware.bin and b/firmware/esp32cam/firmware.bin differ
diff --git a/firmware/esp32cam/version.txt b/firmware/esp32cam/version.txt
index 9d60796..3cacc0b 100644
--- a/firmware/esp32cam/version.txt
+++ b/firmware/esp32cam/version.txt
@@ -1 +1 @@
-11
\ No newline at end of file
+12
\ No newline at end of file
diff --git a/firmware/esp8266/firmware.bin b/firmware/esp8266/firmware.bin
index 7b37df1..775b35c 100644
Binary files a/firmware/esp8266/firmware.bin and b/firmware/esp8266/firmware.bin differ
diff --git a/firmware/esp8266/version.txt b/firmware/esp8266/version.txt
index 9d60796..3cacc0b 100644
--- a/firmware/esp8266/version.txt
+++ b/firmware/esp8266/version.txt
@@ -1 +1 @@
-11
\ No newline at end of file
+12
\ No newline at end of file