diff --git a/deps/microzig b/deps/microzig
index 15bc1fc..4f0d252 160000
--- a/deps/microzig
+++ b/deps/microzig
@@ -1 +1 @@
-Subproject commit 15bc1fc06da3b6c622a21fa438e40be247d9dee1
+Subproject commit 4f0d25220ec8f0501f8e0e9f6765689eb32faa5f
diff --git a/src/hal/multicore.zig b/src/hal/multicore.zig
index 76811cf..f1bcfe0 100644
--- a/src/hal/multicore.zig
+++ b/src/hal/multicore.zig
@@ -55,18 +55,18 @@ pub const fifo = struct {
 var core1_stack: [128]u32 = undefined;
 
 /// Runs `entrypoint` on the second core.
-pub fn launchCore1(entrypoint: fn () void) void {
+pub fn launchCore1(entrypoint: *const fn () void) void {
     launchCore1WithStack(entrypoint, &core1_stack);
 }
 
-pub fn launchCore1WithStack(entrypoint: fn () void, stack: []u32) void {
+pub fn launchCore1WithStack(entrypoint: *const fn () void, stack: []u32) void {
     // TODO: disable SIO interrupts
 
-    const wrapper = struct {
+    const wrapper = &struct {
         fn wrapper(_: u32, _: u32, _: u32, _: u32, entry: u32, stack_base: [*]u32) callconv(.C) void {
             // TODO: protect stack using MPU
             _ = stack_base;
-            @intToPtr(fn () void, entry)();
+            @intToPtr(*const fn () void, entry)();
         }
     }.wrapper;
 
diff --git a/src/hal/pins.zig b/src/hal/pins.zig
index 94f6caa..dce1c24 100644
--- a/src/hal/pins.zig
+++ b/src/hal/pins.zig
@@ -347,19 +347,19 @@ pub fn Pins(comptime config: GlobalConfiguration) type {
 
                     // initialized below:
                     .name = undefined,
-                    .field_type = undefined,
+                    .type = undefined,
                     .alignment = undefined,
                 };
 
                 if (pin_config.function == .SIO) {
                     pin_field.name = pin_config.name orelse field.name;
-                    pin_field.field_type = GPIO(@enumToInt(@field(Pin, field.name)), pin_config.direction orelse .in);
+                    pin_field.type = GPIO(@enumToInt(@field(Pin, field.name)), pin_config.direction orelse .in);
                 } else if (pin_config.function.isPwm()) {
                     pin_field.name = pin_config.name orelse @tagName(pin_config.function);
-                    pin_field.field_type = pwm.PWM(pin_config.function.pwmSlice(), pin_config.function.pwmChannel());
+                    pin_field.type = pwm.PWM(pin_config.function.pwmSlice(), pin_config.function.pwmChannel());
                 } else if (pin_config.function.isAdc()) {
                     pin_field.name = pin_config.name orelse @tagName(pin_config.function);
-                    pin_field.field_type = adc.Input;
+                    pin_field.type = adc.Input;
                     pin_field.default_value = @ptrCast(?*const anyopaque, switch (pin_config.function) {
                         .ADC0 => &adc.Input.ain0,
                         .ADC1 => &adc.Input.ain1,
@@ -382,7 +382,7 @@ pub fn Pins(comptime config: GlobalConfiguration) type {
                 //     }
                 // }
 
-                pin_field.alignment = @alignOf(field.field_type);
+                pin_field.alignment = @alignOf(field.type);
 
                 fields = fields ++ &[_]StructField{pin_field};
             }
@@ -498,11 +498,11 @@ pub const GlobalConfiguration = struct {
                 } else if (comptime func.isPwm()) {
                     gpio.setFunction(gpio_num, .pwm);
                 } else if (comptime func.isAdc()) {
-                    gpio.setFunction(gpio_num, .@"null");
+                    gpio.setFunction(gpio_num, .null);
                 } else if (comptime func.isUartTx() or func.isUartRx()) {
                     gpio.setFunction(gpio_num, .uart);
                 } else {
-                    @compileError(comptime std.fmt.comptimePrint("Unimplemented pin function. Please implement setting pin function {s} for GPIO {}", .{
+                    @compileError(std.fmt.comptimePrint("Unimplemented pin function. Please implement setting pin function {s} for GPIO {}", .{
                         @tagName(func),
                         gpio_num,
                     }));
diff --git a/src/rp2040.zig b/src/rp2040.zig
index 6301bf2..d3c2e18 100644
--- a/src/rp2040.zig
+++ b/src/rp2040.zig
@@ -28780,8 +28780,8 @@ pub fn mmioInt(addr: usize, comptime size: usize, comptime T: type) *volatile Mm
 }
 
 pub const InterruptVector = extern union {
-    C: fn () callconv(.C) void,
-    Naked: fn () callconv(.Naked) void,
+    C: *const fn () callconv(.C) void,
+    Naked: *const fn () callconv(.Naked) void,
     // Interrupt is not supported on arm
 };