diff --git a/meson/ant.version b/meson/ant.version
index c18d72b..899f24f 100644
--- a/meson/ant.version
+++ b/meson/ant.version
@@ -1 +1 @@
-0.8.1
\ No newline at end of file
+0.9.0
\ No newline at end of file
diff --git a/src/modules/worker_threads.c b/src/modules/worker_threads.c
index 8100b8a..31aea86 100644
--- a/src/modules/worker_threads.c
+++ b/src/modules/worker_threads.c
@@ -763,10 +763,14 @@ static ant_value_t worker_threads_message_channel_ctor(ant_t *js, ant_value_t *a
 }
 
 static ant_value_t worker_threads_worker_ctor(ant_t *js, ant_value_t *args, int nargs) {
+  ant_value_t this_obj = js_getthis(js);
+  ant_value_t proto = js_instance_proto_from_new_target(js, js_mkundef());
+
   if (vtype(js->new_target) == T_UNDEF) {
     return js_mkerr(js, "Worker constructor requires 'new'");
   }
   if (nargs < 1) return js_mkerr(js, "Worker() requires a filename or URL");
+  if (is_object_type(this_obj) && is_object_type(proto)) js_set_proto_init(this_obj, proto);
 
   char *script_path = wt_path_from_specifier(js, args[0]);
   if (!script_path) return js_mkerr(js, "Invalid Worker filename/URL");
@@ -822,7 +826,6 @@ static ant_value_t worker_threads_worker_ctor(ant_t *js, ant_value_t *args, int
   }
   env_store_json = env_store_heap;
 
-  ant_value_t this_obj = js_getthis(js);
   ant_worker_thread_t *wt = (ant_worker_thread_t *)calloc(1, sizeof(*wt));
   if (!wt) {
     free(script_path);