diff --git a/antd-zig/examples/02-data.zig b/antd-zig/examples/02-data.zig
index a8189c3..0274337 100644
--- a/antd-zig/examples/02-data.zig
+++ b/antd-zig/examples/02-data.zig
@@ -13,7 +13,7 @@ pub fn main() !void {
     const message = "Hello, Autonomi!";
     std.debug.print("Storing public data: {s}\n", .{message});
 
-    const put_result = try client.dataPutPublic(message);
+    const put_result = try client.dataPutPublic(message, null);
     defer put_result.deinit(allocator);
 
     std.debug.print("Stored at address: {s}\n", .{put_result.address});
diff --git a/antd-zig/examples/06-private-data.zig b/antd-zig/examples/06-private-data.zig
index 9f9d510..80a5cf1 100644
--- a/antd-zig/examples/06-private-data.zig
+++ b/antd-zig/examples/06-private-data.zig
@@ -13,7 +13,7 @@ pub fn main() !void {
     const secret_message = "This is private data";
     std.debug.print("Storing private data...\n", .{});
 
-    const put_result = try client.dataPutPrivate(secret_message);
+    const put_result = try client.dataPutPrivate(secret_message, null);
     defer put_result.deinit(allocator);
 
     std.debug.print("Data map: {s}\n", .{put_result.address});