diff --git a/.github/workflows/wpt.yml b/.github/workflows/wpt.yml
index 9d25847d..3e401cc4 100644
--- a/.github/workflows/wpt.yml
+++ b/.github/workflows/wpt.yml
@@ -40,7 +40,7 @@ jobs:
 
     runs-on: ubuntu-latest
     container:
-      image: ghcr.io/browsercore/zig-browsercore:0.11.0
+      image: ghcr.io/browsercore/zig-browsercore:0.12.0-dev.1773-8a8fd47d2
       credentials:
        username: ${{ github.actor }}
        password: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/zig-fmt.yml b/.github/workflows/zig-fmt.yml
index 189e7c51..a21a831e 100644
--- a/.github/workflows/zig-fmt.yml
+++ b/.github/workflows/zig-fmt.yml
@@ -27,7 +27,7 @@ jobs:
 
     runs-on: ubuntu-latest
     container:
-      image: ghcr.io/browsercore/zig:0.11.0
+      image: ghcr.io/browsercore/zig:0.12.0-dev.1773-8a8fd47d2
       credentials:
        username: ${{ github.actor }}
        password: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/zig-test.yml b/.github/workflows/zig-test.yml
index 45503e3f..7f6effb3 100644
--- a/.github/workflows/zig-test.yml
+++ b/.github/workflows/zig-test.yml
@@ -38,7 +38,7 @@ jobs:
 
     runs-on: ubuntu-latest
     container:
-      image: ghcr.io/browsercore/zig-browsercore:0.11.0
+      image: ghcr.io/browsercore/zig-browsercore:0.12.0-dev.1773-8a8fd47d2
       credentials:
        username: ${{ github.actor }}
        password: ${{ secrets.GITHUB_TOKEN }}
diff --git a/build.zig b/build.zig
index 826916b6..be9cecc2 100644
--- a/build.zig
+++ b/build.zig
@@ -155,6 +155,9 @@ fn linkNetSurf(step: *std.build.LibExeObjStep) void {
     // wrapper
     const flags = [_][]const u8{};
     const files: [1][]const u8 = .{ns ++ "wrapper/wrapper.c"};
-    step.addCSourceFiles(&files, &flags);
+    step.addCSourceFiles(.{
+        .files = &files,
+        .flags = &flags,
+    });
     step.addIncludePath(.{ .path = ns ++ "wrapper" });
 }
diff --git a/src/dom/exceptions.zig b/src/dom/exceptions.zig
index 48650489..b05155e7 100644
--- a/src/dom/exceptions.zig
+++ b/src/dom/exceptions.zig
@@ -45,7 +45,7 @@ pub const DOMException = struct {
 
     // TODO: deinit
     pub fn init(alloc: std.mem.Allocator, err: anyerror, callerName: []const u8) anyerror!DOMException {
-        const errCast = @as(parser.DOMError, @errSetCast(err));
+        const errCast = @as(parser.DOMError, @errorCast(err));
         const errName = DOMException.name(errCast);
         const str = switch (errCast) {
             error.HierarchyRequest => try allocPrint(
diff --git a/src/main.zig b/src/main.zig
index e8f183b5..2dd6403c 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -77,7 +77,7 @@ pub fn main() !void {
     };
 
     // server
-    var addr = try std.net.Address.initUnix(socket_path);
+    const addr = try std.net.Address.initUnix(socket_path);
     server = std.net.StreamServer.init(.{});
     defer server.deinit();
     try server.listen(addr);
diff --git a/src/wpt/run.zig b/src/wpt/run.zig
index a7c77077..26c09a19 100644
--- a/src/wpt/run.zig
+++ b/src/wpt/run.zig
@@ -139,7 +139,7 @@ fn evalJS(env: jsruntime.Env, alloc: std.mem.Allocator, script: []const u8, name
 
 // browse the path to find the tests list.
 pub fn find(allocator: std.mem.Allocator, comptime path: []const u8, list: *std.ArrayList([]const u8)) !void {
-    var dir = try std.fs.cwd().openIterableDir(path, .{ .no_follow = true });
+    var dir = try std.fs.cwd().openDir(path, .{ .iterate = true, .no_follow = true });
     defer dir.close();
 
     var walker = try dir.walk(allocator);
diff --git a/vendor/jsruntime-lib b/vendor/jsruntime-lib
index 254739a9..d80e4f3e 160000
--- a/vendor/jsruntime-lib
+++ b/vendor/jsruntime-lib
@@ -1 +1 @@
-Subproject commit 254739a97282dfe255f0b96fac7e1b854a19934f
+Subproject commit d80e4f3eaf1229f3495bc7dec58c0edd0ab3cad7