finish new i/o

2 files changed, 2 insertions, 3 deletions

diff --git a/README.md b/README.md
index 0986e0c..49af5ea 100644
--- a/README.md
+++ b/README.md
@@ -86,8 +86,7 @@ that if you update one, you may need to also update the other.
 
 ### Version Changes
 
-* *2026-01-xx* zig 0.16.0-dev.xx - file system I/O integrated with the std.Io interface, see [#30232](https://codeberg.org/ziglang/zig/pulls/30232)
-
+* *2025-12-28 zig 0.16.0-dev.1859 - file system I/O integrated with the std.Io interface, see [#30232](https://codeberg.org/ziglang/zig/pulls/30232)
 * *2025-11-01* zig 0.16.0-dev.1204 - more changes due to new I/O API, see [#25592](https://github.com/ziglang/zig/pull/25592)
 * *2025-09-24* zig 0.16.0-dev.377 - Enable passing file content as args, see [#25228](https://github.com/ziglang/zig/pull/25228)
 * *2025-09-03* zig 0.16.0-dev.164 - changes in reader, see [#25077](https://github.com/ziglang/zig/pull/25077)
diff --git a/build.zig b/build.zig
index f945c26..1b27264 100644
--- a/build.zig
+++ b/build.zig
@@ -15,7 +15,7 @@ const print = std.debug.print;
 //     1) Getting Started
 //     2) Version Changes
 comptime {
-    const required_zig = "0.16.0-dev.1204";
+    const required_zig = "0.16.0-dev.1859";
     const current_zig = builtin.zig_version;
     const min_zig = std.SemanticVersion.parse(required_zig) catch unreachable;
     if (current_zig.order(min_zig) == .lt) {