diff --git a/Tactility/Include/Tactility/hal/uart/Configuration.h b/Tactility/Include/Tactility/hal/uart/Configuration.h
index 733afb108..e479190d8 100644
--- a/Tactility/Include/Tactility/hal/uart/Configuration.h
+++ b/Tactility/Include/Tactility/hal/uart/Configuration.h
@@ -1,5 +1,6 @@
 #pragma once
 
+#include <string>
 #include "UartCompat.h"
 
 namespace tt::hal::uart {
@@ -40,4 +41,4 @@ struct Configuration {
 
 #endif
 
-}
\ No newline at end of file
+}
diff --git a/Tactility/Source/app/gpssettings/GpsSettings.cpp b/Tactility/Source/app/gpssettings/GpsSettings.cpp
index aadeff917..8b9613008 100644
--- a/Tactility/Source/app/gpssettings/GpsSettings.cpp
+++ b/Tactility/Source/app/gpssettings/GpsSettings.cpp
@@ -123,7 +123,7 @@ class GpsSettingsApp final : public App {
         lv_label_set_text_fmt(uart_label, "UART: %s", configuration.uartName);
 
         auto* baud_label = lv_label_create(left_wrapper);
-        lv_label_set_text_fmt(baud_label, "Baud: %lu", configuration.baudRate);
+        lv_label_set_text_fmt(baud_label, "Baud: %u", configuration.baudRate);
 
         auto* model_label = lv_label_create(left_wrapper);
         if (configuration.model == hal::gps::GpsModel::Unknown) {
diff --git a/Tactility/Source/app/i2csettings/I2cSettings.cpp b/Tactility/Source/app/i2csettings/I2cSettings.cpp
index bd1690fb4..3dd55d0d9 100644
--- a/Tactility/Source/app/i2csettings/I2cSettings.cpp
+++ b/Tactility/Source/app/i2csettings/I2cSettings.cpp
@@ -66,7 +66,7 @@ static void show(lv_obj_t* parent, const hal::i2c::Configuration& configuration)
     // Frequency:
     if (configuration.config.mode == I2C_MODE_MASTER) {
         auto* frequency_label = lv_label_create(card);
-        lv_label_set_text_fmt(frequency_label, "Frequency: %lu Hz", configuration.config.master.clk_speed);
+        lv_label_set_text_fmt(frequency_label, "Frequency: %" PRIu32 " Hz", configuration.config.master.clk_speed);
         lv_obj_align_to(frequency_label, scl_pin_label, LV_ALIGN_OUT_BOTTOM_LEFT, 0, 0);
     }
 }
diff --git a/Tactility/Source/app/power/Power.cpp b/Tactility/Source/app/power/Power.cpp
index ea4d3eee7..cf14aa501 100644
--- a/Tactility/Source/app/power/Power.cpp
+++ b/Tactility/Source/app/power/Power.cpp
@@ -114,7 +114,7 @@ class PowerApp : public App {
         lv_label_set_text_fmt(chargeStateLabel, "Charging: %s", charge_state);
 
         if (battery_voltage_set) {
-            lv_label_set_text_fmt(batteryVoltageLabel, "Battery voltage: %lu mV", battery_voltage);
+            lv_label_set_text_fmt(batteryVoltageLabel, "Battery voltage: %" PRIu32 " mV", battery_voltage);
         } else {
             lv_label_set_text_fmt(batteryVoltageLabel, "Battery voltage: N/A");
         }
@@ -126,7 +126,7 @@ class PowerApp : public App {
         }
 
         if (current_set) {
-            lv_label_set_text_fmt(currentLabel, "Current: %ld mAh", current);
+            lv_label_set_text_fmt(currentLabel, "Current: %" PRId32 " mAh", current);
         } else {
             lv_label_set_text_fmt(currentLabel, "Current: N/A");
         }
diff --git a/Tactility/Source/network/Url.cpp b/Tactility/Source/network/Url.cpp
index 7cbdca858..3489f29cc 100644
--- a/Tactility/Source/network/Url.cpp
+++ b/Tactility/Source/network/Url.cpp
@@ -48,7 +48,7 @@ std::string urlEncode(const std::string& input) {
         } else if (isalnum(c) || c == '-' || c == '_' || c == '.' || c == '~') {
             result += c;
         } else {
-            sprintf(hex_buffer, "%%%02X", c); //%% means '%' literal, %02X means at least two digits, paddable with a leading zero
+            snprintf(hex_buffer, sizeof(hex_buffer), "%%%02X", c); //%% means '%' literal, %02X means at least two digits, paddable with a leading zero
             result += hex_buffer;
         }
     }
@@ -69,7 +69,7 @@ std::string urlDecode(const std::string& input) {
                 result += input[i];
             }
         } else {
-            sscanf(input.substr(i + 1, 2).c_str(), "%x", &conversion_buffer);
+            sscanf(input.substr(i + 1, 2).c_str(), "%zx", &conversion_buffer);
             char c = static_cast<char>(conversion_buffer);
             result += c;
             i = i + 2;