diff --git a/.github/workflows/zig.yml b/.github/workflows/zig.yml
index a09ce8a..13df2f8 100644
--- a/.github/workflows/zig.yml
+++ b/.github/workflows/zig.yml
@@ -14,7 +14,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: mlugg/setup-zig@v2
         with:
-          version: 0.14.1
+          version: 0.15.1
 
       - name: "Run the tests."
         run: zig test src/tests.zig
diff --git a/README.md b/README.md
index df8ae46..d813c2f 100644
--- a/README.md
+++ b/README.md
@@ -224,7 +224,7 @@ reporter.reportMany(&diagnostics);
 Exports diagnostics to SARIF format (version 2.1.0) as a JSON stream.
 
 ```zig
-try emitSarif(diagnostics, writer);
+try emitSarif(allocator, diagnostics, writer);
 ```
 
 Writes a `runs` array with all diagnostics as SARIF `results`. If a `code` is set, it's included as a rule ID.
@@ -233,7 +233,7 @@ Writes a `runs` array with all diagnostics as SARIF `results`. If a `code` is se
 const file = try std.fs.cwd().createFile("report.sarif.json", .{});
 defer file.close();
 
-try emitSarif(&[_]Diagnostic{diag}, file.writer());
+try emitSarif(std.heap.page_allocator, &[_]Diagnostic{diag}, file.writer());
 ```
 
 Use this to integrate with editors or CI tools that support SARIF (e.g. GitHub, VS Code, etc).
diff --git a/build.zig.zon b/build.zig.zon
index 90c0732..7c169ef 100644
--- a/build.zig.zon
+++ b/build.zig.zon
@@ -2,7 +2,7 @@
     .name = .fehler,
     .version = "0.5.1",
     .fingerprint = 0x2763d78399d579f0,
-    .minimum_zig_version = "0.14.1",
+    .minimum_zig_version = "0.15.1",
     .dependencies = .{},
     .paths = .{
         "build.zig",
diff --git a/src/root.zig b/src/root.zig
index 057538a..3c941d4 100644
--- a/src/root.zig
+++ b/src/root.zig
@@ -451,8 +451,8 @@ const sarif_schema: []const u8 = "https://json.schemastore.org/sarif-2.1.0.json"
 
 /// Emits all diagnostics in SARIF format to the given writer.
 /// Supports version 2.1.0. Includes rule metadata if code is set.
-pub fn emitSarif(diagnostics: []const Diagnostic, writer: anytype) !void {
-    var buf_writer = json.writeStream(writer, .{});
+pub fn emitSarif(allocator: Allocator, diagnostics: []const Diagnostic, writer: *std.io.Writer) !void {
+    var buf_writer = json.Stringify{ .writer = writer };
 
     try buf_writer.beginObject();
 
@@ -485,7 +485,7 @@ pub fn emitSarif(diagnostics: []const Diagnostic, writer: anytype) !void {
     try buf_writer.objectField("rules");
     try buf_writer.beginArray();
 
-    var seen_codes = std.ArrayList([]const u8).init(std.heap.page_allocator);
+    var seen_codes = std.array_list.Managed([]const u8).init(allocator);
     defer seen_codes.deinit();
 
     for (diagnostics) |d| {
diff --git a/src/tests.zig b/src/tests.zig
index ec82246..b0beeee 100644
--- a/src/tests.zig
+++ b/src/tests.zig
@@ -185,10 +185,10 @@ test "emitSarif outputs valid JSON with basic diagnostic" {
         .withLocation("main.zig", 3, 4)
         .withCode("E001");
 
-    var stream = std.io.fixedBufferStream(&buffer);
-    try felher.emitSarif(&[_]Diagnostic{ diag1, diag2 }, stream.writer());
+    var stream = std.io.Writer.fixed(&buffer);
+    try felher.emitSarif(std.heap.page_allocator, &[_]Diagnostic{ diag1, diag2 }, &stream);
 
-    const json = buffer[0..stream.pos];
+    const json = buffer[0..stream.end];
     try testing.expect(std.mem.indexOf(u8, json, "\"message\"") != null);
     try testing.expect(std.mem.indexOf(u8, json, "invalid token") != null);
     try testing.expect(std.mem.indexOf(u8, json, "main.zig") != null);