diff --git a/src/eac.c b/src/eac.c
index 4630e89..bf5ca27 100644
--- a/src/eac.c
+++ b/src/eac.c
@@ -144,7 +144,7 @@ int sm_wrap() {
     if (sm_indicator == 0) {
         return PICOKEY_OK;
     }
-    uint8_t input[4096];
+    uint8_t input[2048];
     size_t input_len = 0;
     memset(input, 0, sizeof(input));
     mbedtls_mpi ssc;
@@ -232,7 +232,7 @@ void sm_update_iv() {
 }
 
 int sm_verify() {
-    uint8_t input[4096];
+    uint8_t input[2048];
     memset(input, 0, sizeof(input));
     uint16_t input_len = 0;
     int r = 0;
@@ -241,7 +241,7 @@ int sm_verify() {
     if (data_len % sm_blocksize) {
         data_len += sm_blocksize;
     }
-    if (data_len + (add_header ? sm_blocksize : 0) > 4096) {
+    if (data_len + (add_header ? sm_blocksize : 0) > sizeof(input)) {
         return PICOKEY_WRONG_LENGTH;
     }
     mbedtls_mpi ssc;
diff --git a/src/esp_compat.h b/src/esp_compat.h
index 6266058..53e78e3 100644
--- a/src/esp_compat.h
+++ b/src/esp_compat.h
@@ -30,7 +30,7 @@ typedef QueueHandle_t queue_t;
 #define queue_is_empty(a) (uxQueueMessagesWaiting(*(a)) == 0)
 #define queue_try_remove(a,b) xQueueReceive(*(a), b, 0)
 extern TaskHandle_t hcore0, hcore1;
-#define multicore_launch_core1(a) xTaskCreatePinnedToCore((void(*)(void *))a, "core1", 4096*5, NULL, CONFIG_TINYUSB_TASK_PRIORITY - 2, &hcore1, 1)
+#define multicore_launch_core1(a) xTaskCreatePinnedToCore((void(*)(void *))a, "core1", 4096*ITF_TOTAL*2, NULL, CONFIG_TINYUSB_TASK_PRIORITY - 2, &hcore1, 1)
 #define multicore_reset_core1() do { if (hcore1) { eTaskState e = eTaskGetState(hcore1); if (e <= eSuspended) { vTaskDelete(hcore1); }} }while(0)
 #define sleep_ms(a) vTaskDelay(a / portTICK_PERIOD_MS)
 static inline uint32_t board_millis(void) {
diff --git a/src/main.c b/src/main.c
index d2ff294..d4cb909 100644
--- a/src/main.c
+++ b/src/main.c
@@ -342,7 +342,7 @@ int main(void) {
 #endif
 
 #ifdef ESP_PLATFORM
-    xTaskCreatePinnedToCore(core0_loop, "core0", 4096*5, NULL, CONFIG_TINYUSB_TASK_PRIORITY - 1, &hcore0, 0);
+    xTaskCreatePinnedToCore(core0_loop, "core0", 4096*ITF_TOTAL*2, NULL, CONFIG_TINYUSB_TASK_PRIORITY - 1, &hcore0, 0);
 #else
     core0_loop();
 #endif
diff --git a/src/usb/tusb_config.h b/src/usb/tusb_config.h
index 141ec36..1fabfa4 100644
--- a/src/usb/tusb_config.h
+++ b/src/usb/tusb_config.h
@@ -99,7 +99,7 @@ extern "C" {
 #endif
 
 #define CFG_TUD_VENDOR_RX_BUFSIZE (TUD_OPT_HIGH_SPEED ? 512 : 64)
-#define CFG_TUD_VENDOR_TX_BUFSIZE 4096
+#define CFG_TUD_VENDOR_TX_BUFSIZE 2048
 
 //------------- CLASS -------------//
 #define CFG_TUD_CDC               0