diff --git a/kits/zig/worker/build.zig b/kits/zig/worker/build.zig
index 40062d2f..150d36b2 100644
--- a/kits/zig/worker/build.zig
+++ b/kits/zig/worker/build.zig
@@ -22,6 +22,7 @@ pub fn build(b: *std.Build) void {
             .optimize = optimize,
         });
 
+        exe.wasi_exec_model = .reactor;
         exe.addModule("worker", worker_module);
 
         b.installArtifact(exe);