diff --git a/.gitignore b/.gitignore
index 29751ba..5211f11 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1 @@
 /.zig-cache/
-/zig-pkg/
diff --git a/build.zig b/build.zig
index 8b5ad53..a069e72 100644
--- a/build.zig
+++ b/build.zig
@@ -34,7 +34,7 @@ pub fn build(b: *std.Build) void {
         ts_bin_query_gen.use_llvm = value;
         ts_bin_query_gen.use_lld = value;
     }
-    ts_bin_query_gen.root_module.link_libc = true;
+    ts_bin_query_gen.linkLibC();
     ts_bin_query_gen.root_module.addImport("cbor", cbor_dep.module("cbor"));
     ts_bin_query_gen.root_module.addImport("treez", tree_sitter_host_dep.module("treez"));
     ts_bin_query_gen.root_module.addImport("build_options", options_mod);
diff --git a/build.zig.zon b/build.zig.zon
index 5de39dc..3166aa2 100644
--- a/build.zig.zon
+++ b/build.zig.zon
@@ -2,16 +2,16 @@
     .name = .flow_syntax,
     .version = "0.7.2",
     .fingerprint = 0x3ba2584ea1cec85f,
-    .minimum_zig_version = "0.16.0-dev.3133+5ec8e45f3",
+    .minimum_zig_version = "0.15.2",
 
     .dependencies = .{
         .tree_sitter = .{
-            .url = "https://github.com/neurocyte/tree-sitter/releases/download/master-70dbb6fa9d998bcf599c3aaeecac7479e9ee3f0c/source.tar.gz",
-            .hash = "tree_sitter-0.26.7-z0LhyGSQZzENNbCzqsMPu63xwpZI1WTHcf62imt-H6YL",
+            .url = "https://github.com/neurocyte/tree-sitter/releases/download/master-9327512f8d36343bb3adfa6fb982b0b467ddce91/source.tar.gz",
+            .hash = "tree_sitter-0.26.7-z0LhyJOPZzF4S6ZW6MrFTfJgiM9Fp81hqKrXUKSBaUAc",
         },
         .cbor = .{
-            .url = "git+https://github.com/neurocyte/cbor?ref=master#66c28df31b8e4448dac7edf063417f2234d6f3c9",
-            .hash = "cbor-1.1.0-RcQE_DZMAQBg77bTLWHEMF7QSF2lWUudUbarD9xC5yVJ",
+            .url = "git+https://github.com/neurocyte/cbor?ref=master#7d2eeb68c8a2fb3f4d6baad6cc04c521b92974c0",
+            .hash = "cbor-1.0.0-RcQE_AswAQAPlqBCZXYQf9DZXn-0Ubt8Mk03ZcJWcsAG",
         },
     },
     .paths = .{
diff --git a/src/QueryCache.zig b/src/QueryCache.zig
index 6cb03a3..024f50b 100644
--- a/src/QueryCache.zig
+++ b/src/QueryCache.zig
@@ -12,16 +12,15 @@ pub const tss = @import("ts_serializer.zig");
 pub const FileType = @import("file_type.zig");
 const Query = treez.Query;
 
-io: std.Io,
 allocator: std.mem.Allocator,
-mutex: ?std.Io.Mutex,
+mutex: ?std.Thread.Mutex,
 highlights: std.StringHashMapUnmanaged(*CacheEntry) = .{},
 injections: std.StringHashMapUnmanaged(*CacheEntry) = .{},
 errors: std.StringHashMapUnmanaged(*CacheEntry) = .{},
 ref_count: usize = 1,
 
 const CacheEntry = struct {
-    mutex: ?std.Io.Mutex,
+    mutex: ?std.Thread.Mutex,
     query: ?*Query,
     query_arena: ?*std.heap.ArenaAllocator,
     query_type: QueryType,
@@ -61,13 +60,12 @@ const CacheError = error{
 
 pub const Error = CacheError || QueryParseError || QuerySerializeError;
 
-pub fn create(io: std.Io, allocator: std.mem.Allocator, opts: struct { lock: bool = false }) !*Self {
+pub fn create(allocator: std.mem.Allocator, opts: struct { lock: bool = false }) !*Self {
     const self = try allocator.create(Self);
     errdefer allocator.destroy(self);
     self.* = .{
-        .io = io,
         .allocator = allocator,
-        .mutex = if (opts.lock) .init else null,
+        .mutex = if (opts.lock) .{} else null,
     };
     return self;
 }
@@ -83,8 +81,8 @@ fn add_ref_locked(self: *Self) void {
 
 fn release_ref_unlocked_and_maybe_destroy(self: *Self) void {
     {
-        if (self.mutex) |*mtx| mtx.lockUncancelable(self.io);
-        defer if (self.mutex) |*mtx| mtx.unlock(self.io);
+        if (self.mutex) |*mtx| mtx.lock();
+        defer if (self.mutex) |*mtx| mtx.unlock();
         self.ref_count -= 1;
         if (self.ref_count > 0) return;
     }
@@ -106,8 +104,8 @@ fn release_cache_entry_hash_map(allocator: std.mem.Allocator, hash_map: *std.Str
 }
 
 fn get_cache_entry(self: *Self, file_type: FileType, comptime query_type: QueryType) CacheError!*CacheEntry {
-    if (self.mutex) |*mtx| mtx.lockUncancelable(self.io);
-    defer if (self.mutex) |*mtx| mtx.unlock(self.io);
+    if (self.mutex) |*mtx| mtx.lock();
+    defer if (self.mutex) |*mtx| mtx.unlock();
 
     const hash = switch (query_type) {
         .highlights => &self.highlights,
@@ -122,7 +120,7 @@ fn get_cache_entry(self: *Self, file_type: FileType, comptime query_type: QueryT
         q.* = .{
             .query = null,
             .query_arena = null,
-            .mutex = if (self.mutex) |_| .init else null,
+            .mutex = if (self.mutex) |_| .{} else null,
             .lang_fn = file_type.lang_fn,
             .file_type_name = file_type.name,
             .query_type = query_type,
@@ -134,8 +132,8 @@ fn get_cache_entry(self: *Self, file_type: FileType, comptime query_type: QueryT
 }
 
 fn get_cached_query(self: *Self, entry: *CacheEntry) Error!?*Query {
-    if (entry.mutex) |*mtx| mtx.lockUncancelable(self.io);
-    defer if (entry.mutex) |*mtx| mtx.unlock(self.io);
+    if (entry.mutex) |*mtx| mtx.lock();
+    defer if (entry.mutex) |*mtx| mtx.unlock();
 
     return if (entry.query) |query| query else blk: {
         const lang = entry.lang_fn() orelse std.debug.panic("tree-sitter parser function failed for language: {s}", .{entry.file_type_name});
@@ -175,7 +173,7 @@ pub fn get(self: *Self, file_type: FileType, comptime query_type: QueryType) Err
     const query = try self.get_cached_query(try self.get_cache_entry(file_type, query_type));
     if (query != null) self.add_ref_locked();
     return switch (@typeInfo(ReturnType(query_type))) {
-        .optional => query,
+        .optional => |_| query,
         else => query.?,
     };
 }
diff --git a/src/syntax.zig b/src/syntax.zig
index 8ae49c5..e461603 100644
--- a/src/syntax.zig
+++ b/src/syntax.zig
@@ -27,7 +27,7 @@ query: *Query,
 errors_query: *Query,
 injections: ?*Query,
 tree: ?*treez.Tree = null,
-injection_list: std.ArrayList(Injection) = .empty,
+injection_list: std.ArrayListUnmanaged(Injection) = .{},
 content: ?[]u8 = null,
 
 pub const Injection = struct {
@@ -484,16 +484,15 @@ pub fn count_error_nodes(self: *const Self) usize {
 }
 
 test "simple build and link test" {
-    const io = std.testing.io;
     const gpa = std.testing.allocator;
 
     const zig_file_type = @import("file_type.zig").get_by_name_static("zig") orelse return error.TestFailed;
-    const query_cache = try QueryCache.create(io, gpa, .{});
+    const query_cache = try QueryCache.create(gpa, .{});
     defer query_cache.deinit();
     const syntax = try create(zig_file_type, gpa, query_cache);
     defer syntax.destroy();
 
-    const content = try std.Io.Dir.readFileAlloc(.cwd(), io, "src/syntax.zig", gpa, .unlimited);
+    const content = try std.fs.cwd().readFileAlloc(gpa, "src/syntax.zig", std.math.maxInt(usize));
     defer gpa.free(content);
     try syntax.refresh_full(content);
 
diff --git a/src/ts_bin_query_gen.zig b/src/ts_bin_query_gen.zig
index 0190b59..a265abe 100644
--- a/src/ts_bin_query_gen.zig
+++ b/src/ts_bin_query_gen.zig
@@ -6,25 +6,24 @@ pub const tss = @import("ts_serializer.zig");
 
 const verbose = false;
 
-pub fn main(init: std.process.Init) anyerror!void {
-    const io = init.io;
+pub fn main() anyerror!void {
     const allocator = std.heap.c_allocator;
+    const args = try std.process.argsAlloc(allocator);
 
     var opt_output_file_path: ?[]const u8 = null;
 
-    var args = try init.minimal.args.iterateAllocator(allocator);
-    defer args.deinit();
-    _ = args.next();
-    while (args.next()) |arg| {
+    var i: usize = 1;
+    while (i < args.len) : (i += 1) {
+        const arg = args[i];
         if (opt_output_file_path != null) fatal("duplicated {s} argument", .{arg});
-        opt_output_file_path = arg;
+        opt_output_file_path = args[i];
     }
 
     const output_file_path = opt_output_file_path orelse fatal("missing output file", .{});
-    var output_file = std.Io.Dir.cwd().createFile(io, output_file_path, .{}) catch |err| {
+    var output_file = std.fs.cwd().createFile(output_file_path, .{}) catch |err| {
         fatal("unable to open '{s}': {s}", .{ output_file_path, @errorName(err) });
     };
-    defer output_file.close(io);
+    defer output_file.close();
 
     var output = std.Io.Writer.Allocating.init(allocator);
     const writer = &output.writer;
@@ -94,7 +93,7 @@ pub fn main(init: std.process.Init) anyerror!void {
         }
     }
 
-    try output_file.writeStreamingAll(io, output.written());
+    try output_file.writeAll(output.written());
     if (verbose)
         std.log.info("file_types total {d} bytes", .{output.written().len});
 }