diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
index 75cdb98..e3e692c 100644
--- a/.devcontainer/Dockerfile
+++ b/.devcontainer/Dockerfile
@@ -3,7 +3,7 @@ FROM mcr.microsoft.com/devcontainers/rust:1-1-bookworm
 RUN apt-get update && apt-get install -y cmake
 
 ARG LLVM_URL=https://github.com/llvm/llvm-project/releases/download/llvmorg-15.0.0/clang+llvm-15.0.0-x86_64-linux-gnu-rhel-8.4.tar.xz
-ARG ZIG_VERSION=zig-linux-x86_64-0.12.0-dev.1856+94c63f31f
+ARG ZIG_VERSION=zig-linux-x86_64-0.12.1
 
 ENV PATH="/usr/bin/zig:${PATH}"
 ENV PATH=/usr/local/llvm/bin:$PATH
@@ -17,8 +17,8 @@ RUN mkdir -p /usr/local/llvm \
 
 WORKDIR /work
 
-RUN git clone https://github.com/Mewz-project/Wasker.git \
-    && cd Wasker \
+RUN git clone https://github.com/mewz-project/wasker.git \
+    && cd wasker \
     && cargo build --release \
     && cp target/release/wasker /usr/bin
 
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index a4d2fb2..726b4e1 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -23,7 +23,7 @@ jobs:
       - name: Install Zig
         uses: goto-bus-stop/setup-zig@v2
         with:
-          version: 0.12.0-dev.926+3be8490d8
+          version: 0.12.1
           cache: true
 
       - name: Install packages for running tests
diff --git a/build.zig b/build.zig
index b0673c9..b5af2aa 100644
--- a/build.zig
+++ b/build.zig
@@ -1,7 +1,7 @@
 const std = @import("std");
 const Build = @import("std").Build;
 const Target = @import("std").Target;
-const CrossTarget = @import("std").zig.CrossTarget;
+const Query = @import("std").Target.Query;
 const Feature = @import("std").Target.Cpu.Feature;
 
 const TEST_DIR_PATH = "build/test";
@@ -91,7 +91,7 @@ pub fn build(b: *Build) !void {
     disabled_features.addFeature(@intFromEnum(features.avx2));
     enabled_features.addFeature(@intFromEnum(features.soft_float));
 
-    const target = CrossTarget{ .cpu_arch = Target.Cpu.Arch.x86_64, .os_tag = Target.Os.Tag.freestanding, .cpu_features_sub = disabled_features, .cpu_features_add = enabled_features };
+    const target = Query{ .cpu_arch = Target.Cpu.Arch.x86_64, .os_tag = Target.Os.Tag.freestanding, .cpu_features_sub = disabled_features, .cpu_features_add = enabled_features };
 
     const optimize = b.standardOptimizeOption(.{});
 
@@ -102,10 +102,10 @@ pub fn build(b: *Build) !void {
         .name = "mewz.elf",
         .root_source_file = .{ .path = "src/main.zig" },
         .optimize = optimize,
-        .target = target,
-        .linkage = std.build.CompileStep.Linkage.static,
+        .target = b.resolveTargetQuery(target),
+        .linkage = std.builtin.LinkMode.static,
     });
-    kernel.code_model = .kernel;
+    kernel.entry = .{ .symbol_name = "boot" };
     kernel.setLinkerScriptPath(.{ .path = "src/x64.ld" });
     kernel.addAssemblyFile(Build.LazyPath{ .path = "src/boot.S" });
     kernel.addAssemblyFile(Build.LazyPath{ .path = "src/interrupt.S" });
@@ -113,15 +113,15 @@ pub fn build(b: *Build) !void {
     kernel.addObjectFile(Build.LazyPath{ .path = "build/lwip/libtcpip.a" });
     kernel.addObjectFile(Build.LazyPath{ .path = "build/lwip/liblwipcore.a" });
     kernel.addObjectFile(Build.LazyPath{ .path = "build/lwip/liblwipallapps.a" });
-    kernel.addCSourceFile(Build.Step.Compile.CSourceFile{ .file = Build.LazyPath{ .path = "src/c/newlib_support.c" }, .flags = &[_][]const u8{ "-I", "submodules/newlib/newlib/libc/include" } });
-    kernel.addCSourceFile(Build.Step.Compile.CSourceFile{ .file = Build.LazyPath{ .path = "src/c/lwip_support.c" }, .flags = &[_][]const u8{ "-I", "submodules/newlib/newlib/libc/include" } });
+    kernel.addCSourceFile(Build.Module.CSourceFile{ .file = Build.LazyPath{ .path = "src/c/newlib_support.c" }, .flags = &[_][]const u8{ "-I", "submodules/newlib/newlib/libc/include" } });
+    kernel.addCSourceFile(Build.Module.CSourceFile{ .file = Build.LazyPath{ .path = "src/c/lwip_support.c" }, .flags = &[_][]const u8{ "-I", "submodules/newlib/newlib/libc/include" } });
     if (params.obj_path) |p| {
         kernel.addObjectFile(Build.LazyPath{ .path = p });
     }
     if (params.dir_path) |_| {
         kernel.addObjectFile(Build.LazyPath{ .path = "build/disk.o" });
     }
-    kernel.addOptions("options", options);
+    kernel.root_module.addOptions("options", options);
     b.installArtifact(kernel);
 
     const kernel_step = b.step("kernel", "Build the kernel");
diff --git a/src/drivers/virtio/common.zig b/src/drivers/virtio/common.zig
index 4d9520d..b093548 100644
--- a/src/drivers/virtio/common.zig
+++ b/src/drivers/virtio/common.zig
@@ -535,7 +535,7 @@ pub fn VirtioMmioTransport(comptime DeviceConfigType: type) type {
             }
 
             self.common_config.queue_select = virtq.index;
-            @fence(std.builtin.AtomicOrder.SeqCst);
+            @fence(std.builtin.AtomicOrder.seq_cst);
             const offset = self.notify_off_multiplier * self.common_config.queue_notify_off;
             const addr = self.notify + @as(usize, @intCast(offset));
             @as(*volatile u16, @ptrFromInt(addr)).* = virtq.index;
diff --git a/src/fs.zig b/src/fs.zig
index 67585eb..bb80371 100644
--- a/src/fs.zig
+++ b/src/fs.zig
@@ -99,7 +99,8 @@ pub fn init() void {
     }
 
     log.debug.printf("FILES_MAX: {d}\n", .{FILES_MAX});
-    const disk_pointer = @as([*]u8, @ptrCast(&_binary_build_disk_tar_start));
+    const disk_ptr_addr = &_binary_build_disk_tar_start;
+    const disk_pointer = @as([*]u8, @ptrCast(@constCast(disk_ptr_addr)));
 
     var off: usize = 0;
     var i: usize = 0;
diff --git a/src/sync.zig b/src/sync.zig
index 2815a45..bd6ab51 100644
--- a/src/sync.zig
+++ b/src/sync.zig
@@ -20,13 +20,13 @@ pub fn SpinLock(comptime T: type) type {
                 @panic("deadlock");
             }
 
-            while (@atomicRmw(bool, &this.locked, builtin.AtomicRmwOp.Xchg, true, builtin.AtomicOrder.Acquire)) {}
+            while (@atomicRmw(bool, &this.locked, builtin.AtomicRmwOp.Xchg, true, builtin.AtomicOrder.acquire)) {}
 
             return @as(*T, @alignCast(@ptrCast(this.ptr)));
         }
 
         pub fn release(this: *volatile This) void {
-            _ = @atomicRmw(bool, &this.locked, builtin.AtomicRmwOp.Xchg, false, builtin.AtomicOrder.Release);
+            _ = @atomicRmw(bool, &this.locked, builtin.AtomicRmwOp.Xchg, false, builtin.AtomicOrder.release);
 
             popcli();
         }
@@ -43,13 +43,13 @@ pub const Waiter = struct {
     }
 
     pub fn setWait(self: *volatile Self) void {
-        @atomicStore(bool, &self.waiting, true, builtin.AtomicOrder.SeqCst);
+        @atomicStore(bool, &self.waiting, true, builtin.AtomicOrder.seq_cst);
     }
 
     pub fn wait(self: *volatile Self) void {
         while (true) {
             while (self.waiting) {}
-            if (!@atomicLoad(bool, &self.waiting, builtin.AtomicOrder.SeqCst)) {
+            if (!@atomicLoad(bool, &self.waiting, builtin.AtomicOrder.seq_cst)) {
                 break;
             }
         }
diff --git a/src/timer.zig b/src/timer.zig
index 324305b..3603dd1 100644
--- a/src/timer.zig
+++ b/src/timer.zig
@@ -41,7 +41,7 @@ pub const Timer = struct {
     }
 
     pub fn isFinished(self: *Self) bool {
-        return @atomicLoad(bool, &self.*.is_finished_internal, std.builtin.AtomicOrder.SeqCst);
+        return @atomicLoad(bool, &self.*.is_finished_internal, std.builtin.AtomicOrder.seq_cst);
     }
 };
 
diff --git a/src/x64.zig b/src/x64.zig
index 68feaa0..f1fa797 100644
--- a/src/x64.zig
+++ b/src/x64.zig
@@ -4,7 +4,7 @@ pub const EFLAGS_IF = 0x00000200;
 
 pub fn init() void {
     enableSSE();
-    @fence(std.builtin.AtomicOrder.SeqCst);
+    @fence(std.builtin.AtomicOrder.seq_cst);
     enableAVX();
 }
 
diff --git a/submodules/lwip b/submodules/lwip
index 1cc1536..73fcf72 160000
--- a/submodules/lwip
+++ b/submodules/lwip
@@ -1 +1 @@
-Subproject commit 1cc1536e6a7117e23ebaf5546405a843a3e558ae
+Subproject commit 73fcf72792a926a4e0ac8b656b29bff70552d927