diff --git a/.zigversion b/.zigversion
index a803cc2..8c5723d 100644
--- a/.zigversion
+++ b/.zigversion
@@ -1 +1 @@
-0.14.0
+0.15.0-dev
diff --git a/build.zig.zon b/build.zig.zon
index 1acc81d..65dd34e 100644
--- a/build.zig.zon
+++ b/build.zig.zon
@@ -2,7 +2,7 @@
     .name = .zstbi,
     .fingerprint = 0x3c971054ff1a412f,
     .version = "0.11.0-dev",
-    .minimum_zig_version = "0.13.0-dev.351+64ef45eb0",
+    .minimum_zig_version = "0.15.0-dev.552+bc2f7c754",
     .paths = .{
         "build.zig",
         "build.zig.zon",
diff --git a/src/zstbi.zig b/src/zstbi.zig
index b0908f7..6a68886 100644
--- a/src/zstbi.zig
+++ b/src/zstbi.zig
@@ -380,7 +380,7 @@ pub fn setFlipVerticallyOnWrite(should_flip: bool) void {
 var mem_allocator: ?std.mem.Allocator = null;
 var mem_allocations: ?std.AutoHashMap(usize, usize) = null;
 var mem_mutex: std.Thread.Mutex = .{};
-const mem_alignment = 16;
+const mem_alignment = std.mem.Alignment.@"16";
 
 extern var zstbiMallocPtr: ?*const fn (size: usize) callconv(.C) ?*anyopaque;
 extern var zstbiwMallocPtr: ?*const fn (size: usize) callconv(.C) ?*anyopaque;
@@ -409,9 +409,9 @@ fn zstbiRealloc(ptr: ?*anyopaque, size: usize) callconv(.C) ?*anyopaque {
 
     const old_size = if (ptr != null) mem_allocations.?.get(@intFromPtr(ptr.?)).? else 0;
     const old_mem = if (old_size > 0)
-        @as([*]align(mem_alignment) u8, @ptrCast(@alignCast(ptr)))[0..old_size]
+        @as([*]align(mem_alignment.toByteUnits()) u8, @ptrCast(@alignCast(ptr)))[0..old_size]
     else
-        @as([*]align(mem_alignment) u8, undefined)[0..0];
+        @as([*]align(mem_alignment.toByteUnits()) u8, undefined)[0..0];
 
     const new_mem = mem_allocator.?.realloc(old_mem, size) catch @panic("zstbi: out of memory");
 
@@ -434,7 +434,7 @@ fn zstbiFree(maybe_ptr: ?*anyopaque) callconv(.C) void {
         defer mem_mutex.unlock();
 
         const size = mem_allocations.?.fetchRemove(@intFromPtr(ptr)).?.value;
-        const mem = @as([*]align(mem_alignment) u8, @ptrCast(@alignCast(ptr)))[0..size];
+        const mem = @as([*]align(mem_alignment.toByteUnits()) u8, @ptrCast(@alignCast(ptr)))[0..size];
         mem_allocator.?.free(mem);
     }
 }