diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7f56397f..86c54a3c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,6 +5,7 @@ set(SDKCONFIG_DEFAULTS "sdkconfig.common")
 
 # No exceptions in app builds (this is different in test builds).
 idf_build_set_property(COMPILE_OPTIONS "-DRESULT_DISABLE_EXCEPTIONS" APPEND)
+idf_build_set_property(COMPILE_OPTIONS "-DTCB_SPAN_NO_CONTRACT_CHECKING" APPEND)
 
 # Include all app components.
 list(APPEND EXTRA_COMPONENT_DIRS "$ENV{PROJ_PATH}/src")
diff --git a/dependencies.lock b/dependencies.lock
index 21edf3ef..888b56a2 100644
--- a/dependencies.lock
+++ b/dependencies.lock
@@ -1,3 +1,9 @@
-manifest_hash: e0cfd1319bfb46d732ec9d319e9dc49e36898e504018c81401232151605e3547
+dependencies:
+  idf:
+    component_hash: null
+    source:
+      type: idf
+    version: 5.0.0
+manifest_hash: 7e6103d8e34e5eabd5a6a51c49836c58f1686c3aa287f2e288b1ad76243aa61a
 target: esp32
 version: 1.0.0
diff --git a/src/audio/audio_element_handle.cpp b/src/audio/audio_element_handle.cpp
index 4b746db3..1250bbcf 100644
--- a/src/audio/audio_element_handle.cpp
+++ b/src/audio/audio_element_handle.cpp
@@ -1,6 +1,7 @@
 #include "audio_element_handle.hpp"
 #include "audio_element.hpp"
 #include "freertos/projdefs.h"
+#include "freertos/task.h"
 
 namespace audio {
 
@@ -47,7 +48,7 @@ auto AudioElementHandle::QuitSync() -> void {
 }
 
 auto AudioElementHandle::MonitorUtilState(eTaskState desired) -> void {
-  while (eTaskGetState(task_.get()) != desired) {
+  while (eTaskGetState(*task_) != desired) {
     WakeUpTask();
     vTaskDelay(pdMS_TO_TICKS(1));
   }
@@ -63,13 +64,13 @@ auto AudioElementHandle::WakeUpTask() -> void {
   // between now and its next element state check. Also think about chunk blocks
   // nested in element bodies.
   // Maybe we need a big mutex or semaphore somewhere in here.
-  switch (eTaskGetState(task_.get())) {
+  switch (eTaskGetState(*task_)) {
     case eBlocked:
       // TODO: when is this safe?
-      xTaskAbortDelay(task_.get());
+      xTaskAbortDelay(*task_);
       break;
     case eSuspended:
-      vTaskResume(task_.get());
+      vTaskResume(*task_);
       break;
     default:
       return;
diff --git a/src/drivers/battery.cpp b/src/drivers/battery.cpp
index b45e20cf..29224e2d 100644
--- a/src/drivers/battery.cpp
+++ b/src/drivers/battery.cpp
@@ -2,17 +2,19 @@
 #include <cstdint>
 
 #include "esp_adc/adc_oneshot.h"
+#include "esp_adc/adc_cali.h"
+#include "esp_adc/adc_cali_scheme.h"
 #include "hal/adc_types.h"
 
 namespace drivers {
 
-static const uint8_t kAdcBitWidth = ADC_BITWIDTH_12;
-static const uint8_t kAdcUnit = ADC_UNIT_1;
+static const adc_bitwidth_t kAdcBitWidth = ADC_BITWIDTH_12;
+static const adc_unit_t kAdcUnit = ADC_UNIT_1;
 // Max battery voltage should be a little over 2V due to our divider, so we need
 // the max attenuation to properly handle the full range.
-static const uint8_t kAdcAttenuation = ADC_ATTEN_DB_11;
+static const adc_atten_t kAdcAttenuation = ADC_ATTEN_DB_11;
 // Corresponds to GPIO 34.
-static const uint8_t kAdcChannel = ADC_CHANNEL_6;
+static const adc_channel_t kAdcChannel = ADC_CHANNEL_6;
 
 Battery::Battery() {
   adc_oneshot_unit_init_cfg_t unit_config = {
@@ -21,8 +23,8 @@ Battery::Battery() {
   ESP_ERROR_CHECK(adc_oneshot_new_unit(&unit_config, &adc_handle_));
 
   adc_oneshot_chan_cfg_t channel_config = {
-    .bitwidth = kAdcBitWidth,
     .atten = kAdcAttenuation,
+    .bitwidth = kAdcBitWidth,
   };
   ESP_ERROR_CHECK(adc_oneshot_config_channel(adc_handle_, kAdcChannel, &channel_config));
   
@@ -42,11 +44,11 @@ Battery::~Battery() {
 
 auto Battery::Millivolts() -> uint32_t {
   // GPIO 34
-  int raw;
-  ESP_ERROR_CHECK(adc_oneshot_read(adc_handle, kAdcChannel &raw));
+  int raw = 0;
+  ESP_ERROR_CHECK(adc_oneshot_read(adc_handle_, kAdcChannel, &raw));
 
-  int voltage;
-  ESP_ERROR_CHECK(adc_cali_raw_to_voltage(adc_calibration_handle, raw, &voltage));
+  int voltage = 0;
+  ESP_ERROR_CHECK(adc_cali_raw_to_voltage(adc_calibration_handle_, raw, &voltage));
 
   return voltage;
 }
diff --git a/src/drivers/dac.cpp b/src/drivers/dac.cpp
index 23c67e88..78bf94c4 100644
--- a/src/drivers/dac.cpp
+++ b/src/drivers/dac.cpp
@@ -5,6 +5,8 @@
 #include "assert.h"
 #include "driver/i2c.h"
 #include "driver/i2s.h"
+#include "driver/i2s_types.h"
+#include "driver/i2s_types_legacy.h"
 #include "esp_err.h"
 #include "esp_log.h"
 #include "hal/i2c_types.h"
@@ -17,7 +19,7 @@ namespace drivers {
 
 static const char* kTag = "AUDIODAC";
 static const uint8_t kPcm5122Address = 0x4C;
-static const uint8_t kPcm5122Timeout = 100 / portTICK_RATE_MS;
+static const uint8_t kPcm5122Timeout = pdMS_TO_TICKS(100);
 static const i2s_port_t kI2SPort = I2S_NUM_0;
 
 static const AudioDac::SampleRate kDefaultSampleRate =
@@ -46,7 +48,7 @@ auto AudioDac::create(GpioExpander* expander)
       .use_apll = false,
       .tx_desc_auto_clear = false,
       .fixed_mclk = 0,
-      .mclk_multiple = I2S_MCLK_MULTIPLE_DEFAULT,
+      .mclk_multiple = I2S_MCLK_MULTIPLE_512, // TODO: double check
       .bits_per_chan = I2S_BITS_PER_CHAN_DEFAULT,
   };
 
diff --git a/src/drivers/display.cpp b/src/drivers/display.cpp
index 8aaca4a4..83710f45 100644
--- a/src/drivers/display.cpp
+++ b/src/drivers/display.cpp
@@ -122,7 +122,7 @@ auto Display::create(GpioExpander* expander,
   ESP_LOGI(kTag, "Registering driver");
   display->display_ = lv_disp_drv_register(&display->driver_);
 
-  return std::move(display);
+  return display;
 }
 
 Display::Display(GpioExpander* gpio, spi_device_handle_t handle)
diff --git a/src/drivers/include/battery.hpp b/src/drivers/include/battery.hpp
index 9366a5b1..dea46d7c 100644
--- a/src/drivers/include/battery.hpp
+++ b/src/drivers/include/battery.hpp
@@ -3,6 +3,7 @@
 #include <cstdint>
 
 #include "esp_adc/adc_oneshot.h"
+#include "esp_adc/adc_cali.h"
 #include "esp_err.h"
 #include "result.hpp"
 
@@ -18,7 +19,7 @@ class Battery {
      */
     auto Millivolts() -> uint32_t;
   private:
-    adc_oneshot_handle_t adc_handle_;
+    adc_oneshot_unit_handle_t adc_handle_;
     adc_cali_handle_t adc_calibration_handle_;
 };
 
diff --git a/src/drivers/include/dac.hpp b/src/drivers/include/dac.hpp
index dc03624b..2d4e812f 100644
--- a/src/drivers/include/dac.hpp
+++ b/src/drivers/include/dac.hpp
@@ -9,6 +9,7 @@
 #include "hal/i2s_types.h"
 #include "result.hpp"
 #include "span.hpp"
+#include "driver/i2s_types_legacy.h"
 
 #include "gpio_expander.hpp"
 
diff --git a/src/drivers/include/display.hpp b/src/drivers/include/display.hpp
index 75b2f9a6..5f6d6f58 100644
--- a/src/drivers/include/display.hpp
+++ b/src/drivers/include/display.hpp
@@ -8,6 +8,7 @@
 
 #include "display_init.hpp"
 #include "gpio_expander.hpp"
+#include "sys/_stdint.h"
 
 namespace drivers {
 
@@ -63,7 +64,7 @@ class Display {
   void SendTransaction(TransactionType type,
                        const uint8_t* data,
                        size_t length,
-                       uintptr_t flags = 0);
+                       uint32_t flags = 0);
 };
 
 }  // namespace drivers
diff --git a/src/drivers/include/gpio_expander.hpp b/src/drivers/include/gpio_expander.hpp
index 8875e954..a6e96d87 100644
--- a/src/drivers/include/gpio_expander.hpp
+++ b/src/drivers/include/gpio_expander.hpp
@@ -32,7 +32,7 @@ class GpioExpander {
   ~GpioExpander();
 
   static const uint8_t kPca8575Address = 0x20;
-  static const uint8_t kPca8575Timeout = 100 / portTICK_RATE_MS;
+  static const uint8_t kPca8575Timeout = pdMS_TO_TICKS(100);
 
   // Port A:
   // 0 - audio power enable
diff --git a/src/drivers/include/i2c.hpp b/src/drivers/include/i2c.hpp
index 3704509d..dbdd8a11 100644
--- a/src/drivers/include/i2c.hpp
+++ b/src/drivers/include/i2c.hpp
@@ -20,7 +20,7 @@ esp_err_t deinit_i2c(void);
  */
 class I2CTransaction {
  public:
-  static const uint8_t kI2CTimeout = 100 / portTICK_RATE_MS;
+  static const uint8_t kI2CTimeout = pdMS_TO_TICKS(100);
 
   I2CTransaction();
   ~I2CTransaction();
diff --git a/src/main/main.cpp b/src/main/main.cpp
index ad4b2d01..2f874bc7 100644
--- a/src/main/main.cpp
+++ b/src/main/main.cpp
@@ -106,7 +106,7 @@ extern "C" void app_main(void) {
 
   ESP_LOGI(TAG, "Init battery measurement");
   drivers::Battery* battery = new drivers::Battery();
-  ESP_LOGI(TAG, "it's reading %dmV!", battery->Millivolts());
+  ESP_LOGI(TAG, "it's reading %d mV!", (int) battery->Millivolts());
 
   ESP_LOGI(TAG, "Init SD card");
   auto storage_res = drivers::SdStorage::create(expander);