diff --git a/README.md b/README.md
index 6e61c2c..67cd442 100644
--- a/README.md
+++ b/README.md
@@ -35,7 +35,7 @@ const libxml2_dependency = b.dependency("libxml2", .{
     // .iconv = !(target.query.isNativeOs() and target.result.os.tag.isDarwin()),
 
     // Use GNU libiconv on macOS which is licensed under LGPL.
-    // .@"iconv-impl" = if (target.result.os.tag.isDarwin()) else null,
+    // .@"iconv-impl" = @as(?enum{libc, libiconv, win_iconv}, if (target.result.os.tag.isDarwin()) .libiconv else null),
 });
 your_exe.linkLibrary(libxml2_dependency.artifact("xml"));
 ```
diff --git a/build.zig b/build.zig
index d94763d..2a65321 100644
--- a/build.zig
+++ b/build.zig
@@ -1,5 +1,7 @@
 const std = @import("std");
 
+pub const IconvImpl = enum { libc, libiconv, win_iconv };
+
 pub fn build(b: *std.Build) void {
     const upstream = b.dependency("libxml2", .{});
     const target = b.standardTargetOptions(.{});
@@ -184,7 +186,6 @@ pub fn build(b: *std.Build) void {
         if (b.systemIntegrationOption("iconv", .{ .default = target.result.os.tag.isDarwin() })) {
             xml_lib.root_module.linkSystemLibrary("iconv", .{});
         } else {
-            const IconvImpl = enum { libc, libiconv, win_iconv };
             const impl: IconvImpl = b.option(
                 IconvImpl,
                 "iconv-impl",
diff --git a/build.zig.zon b/build.zig.zon
index 659cb97..5a9dfda 100644
--- a/build.zig.zon
+++ b/build.zig.zon
@@ -8,8 +8,8 @@
             .hash = "N-V-__8AAPCbSwEcttmGC8VZFtoJxaP06X_upd7O13NMUkIf",
         },
         .zlib = .{
-            .url = "git+https://github.com/allyourcodebase/zlib.git#61e7df7e996ec5a5f13a653db3c419adb340d6ef",
-            .hash = "zlib-1.3.1-ZZQ7lbYMAAB1hTSOKSXAKAgHsfDcyWNH_37ojw5WSpgR",
+            .url = "git+https://github.com/allyourcodebase/zlib.git#c5115f4b69ef660f72a835c6638f80508ef284c7",
+            .hash = "zlib-1.3.1-1-ZZQ7ldENAAA7qJjUXP6E6xnRuV-jDL9dyoJFc_eb3zQ6",
             .lazy = true,
         },
         .libiconv = .{
@@ -18,8 +18,8 @@
             .lazy = true,
         },
         .win_iconv = .{
-            .url = "git+https://github.com/allyourcodebase/win-iconv.git#497c381e41437856527b7a00b66e75af3f1f7dcc",
-            .hash = "win_iconv-0.0.10--19NP7MRAAD3CC0z2Jp2YTy649Q724cYYaR9uL7v7NCh",
+            .url = "git+https://github.com/allyourcodebase/win-iconv.git#341e958b33f1cd1142f00a561510d83e6556f1fd",
+            .hash = "win_iconv-0.0.10--19NP7MRAAAnmImNeW9llGV-UPmCHV-4MN_FVzNhb-P0",
             .lazy = true,
         },
     },