diff --git a/.clang-format b/.clang-format
index 86cd149..614acb7 100644
--- a/.clang-format
+++ b/.clang-format
@@ -8,7 +8,3 @@ BinPackParameters: false
 ContinuationIndentWidth: 2
 ColumnLimit: 0
 SpaceAfterCStyleCast: true
-SpaceBeforeParens: Custom
-SpaceBeforeParensOptions:
-  AfterFunctionDeclarationName: true
-  AfterFunctionDefinitionName: true
diff --git a/binding.c b/binding.c
index 9b3b53e..afb1d29 100644
--- a/binding.c
+++ b/binding.c
@@ -12,17 +12,20 @@ typedef struct {
   int active_handles;
 
   js_env_t *env;
+  js_ref_t *ctx;
   js_ref_t *on_timer;
   js_ref_t *on_check;
 
   int64_t next_delay;
+
+  js_deferred_teardown_t *teardown;
 } bare_timer_t;
 
 static void
-bare_timers__on_idle (uv_idle_t *handle) {}
+bare_timers__on_idle(uv_idle_t *handle) {}
 
 static void
-bare_timers__on_check (uv_check_t *handle) {
+bare_timers__on_check(uv_check_t *handle) {
   int err;
 
   bare_timer_t *self = (bare_timer_t *) handle->data;
@@ -54,7 +57,7 @@ bare_timers__on_check (uv_check_t *handle) {
 }
 
 static void
-bare_timers__on_timer (uv_timer_t *handle) {
+bare_timers__on_timer(uv_timer_t *handle) {
   int err;
 
   bare_timer_t *self = (bare_timer_t *) handle->data;
@@ -99,7 +102,7 @@ bare_timers__on_timer (uv_timer_t *handle) {
 }
 
 static void
-bare_timers__on_close (uv_handle_t *handle) {
+bare_timers__on_close(uv_handle_t *handle) {
   int err;
 
   bare_timer_t *self = (bare_timer_t *) handle->data;
@@ -111,10 +114,25 @@ bare_timers__on_close (uv_handle_t *handle) {
 
   err = js_delete_reference(self->env, self->on_check);
   assert(err == 0);
+
+  err = js_delete_reference(self->env, self->ctx);
+  assert(err == 0);
+
+  err = js_finish_deferred_teardown_callback(self->teardown);
+  assert(err == 0);
+}
+
+static void
+bare_timers__on_teardown(js_deferred_teardown_t *handle, void *data) {
+  bare_timer_t *self = (bare_timer_t *) data;
+
+  uv_close((uv_handle_t *) &self->timer, bare_timers__on_close);
+  uv_close((uv_handle_t *) &self->check, bare_timers__on_close);
+  uv_close((uv_handle_t *) &self->idle, bare_timers__on_close);
 }
 
 static js_value_t *
-bare_timers_init (js_env_t *env, js_callback_info_t *info) {
+bare_timers_init(js_env_t *env, js_callback_info_t *info) {
   int err;
 
   size_t argc = 2;
@@ -143,67 +161,37 @@ bare_timers_init (js_env_t *env, js_callback_info_t *info) {
   self->idle.data = self;
 
   err = uv_timer_init(loop, &self->timer);
-  if (err < 0) {
-    js_throw_error(env, uv_err_name(err), uv_strerror(err));
-    return NULL;
-  }
-
-  self->active_handles++;
+  assert(err == 0);
 
   err = uv_check_init(loop, &self->check);
-  if (err < 0) {
-    js_throw_error(env, uv_err_name(err), uv_strerror(err));
-    return NULL;
-  }
-
-  self->active_handles++;
+  assert(err == 0);
 
   err = uv_idle_init(loop, &self->idle);
-  if (err < 0) {
-    js_throw_error(env, uv_err_name(err), uv_strerror(err));
-    return NULL;
-  }
+  assert(err == 0);
 
-  self->active_handles++;
+  self->active_handles = 3;
 
   uv_unref((uv_handle_t *) &self->timer);
   uv_unref((uv_handle_t *) &self->check);
   uv_unref((uv_handle_t *) &self->idle);
 
-  err = js_create_reference(env, argv[0], 1, &self->on_timer);
+  err = js_add_deferred_teardown_callback(env, bare_timers__on_teardown, (void *) self, &self->teardown);
   assert(err == 0);
 
-  err = js_create_reference(env, argv[1], 1, &self->on_check);
+  err = js_create_reference(env, handle, 1, &self->ctx);
   assert(err == 0);
 
-  return handle;
-}
-
-static js_value_t *
-bare_timers_destroy (js_env_t *env, js_callback_info_t *info) {
-  int err;
-
-  size_t argc = 1;
-  js_value_t *argv[1];
-
-  err = js_get_callback_info(env, info, &argc, argv, NULL, NULL);
+  err = js_create_reference(env, argv[0], 1, &self->on_timer);
   assert(err == 0);
 
-  assert(argc == 1);
-
-  bare_timer_t *self;
-  err = js_get_arraybuffer_info(env, argv[0], (void **) &self, NULL);
+  err = js_create_reference(env, argv[1], 1, &self->on_check);
   assert(err == 0);
 
-  uv_close((uv_handle_t *) &self->timer, bare_timers__on_close);
-  uv_close((uv_handle_t *) &self->check, bare_timers__on_close);
-  uv_close((uv_handle_t *) &self->idle, bare_timers__on_close);
-
-  return NULL;
+  return handle;
 }
 
 static js_value_t *
-bare_timers_pause (js_env_t *env, js_callback_info_t *info) {
+bare_timers_pause(js_env_t *env, js_callback_info_t *info) {
   int err;
 
   size_t argc = 1;
@@ -232,7 +220,7 @@ bare_timers_pause (js_env_t *env, js_callback_info_t *info) {
 }
 
 static js_value_t *
-bare_timers_resume (js_env_t *env, js_callback_info_t *info) {
+bare_timers_resume(js_env_t *env, js_callback_info_t *info) {
   int err;
 
   size_t argc = 3;
@@ -273,7 +261,7 @@ bare_timers_resume (js_env_t *env, js_callback_info_t *info) {
 }
 
 static js_value_t *
-bare_timers_ref (js_env_t *env, js_callback_info_t *info) {
+bare_timers_ref(js_env_t *env, js_callback_info_t *info) {
   int err;
 
   size_t argc = 1;
@@ -296,7 +284,7 @@ bare_timers_ref (js_env_t *env, js_callback_info_t *info) {
 }
 
 static js_value_t *
-bare_timers_unref (js_env_t *env, js_callback_info_t *info) {
+bare_timers_unref(js_env_t *env, js_callback_info_t *info) {
   int err;
 
   size_t argc = 1;
@@ -319,7 +307,7 @@ bare_timers_unref (js_env_t *env, js_callback_info_t *info) {
 }
 
 static js_value_t *
-bare_timers_start (js_env_t *env, js_callback_info_t *info) {
+bare_timers_start(js_env_t *env, js_callback_info_t *info) {
   int err;
 
   size_t argc = 2;
@@ -350,7 +338,7 @@ bare_timers_start (js_env_t *env, js_callback_info_t *info) {
 }
 
 static js_value_t *
-bare_timers_stop (js_env_t *env, js_callback_info_t *info) {
+bare_timers_stop(js_env_t *env, js_callback_info_t *info) {
   int err;
 
   size_t argc = 1;
@@ -375,7 +363,7 @@ bare_timers_stop (js_env_t *env, js_callback_info_t *info) {
 }
 
 static js_value_t *
-bare_timers_immediate (js_env_t *env, js_callback_info_t *info) {
+bare_timers_immediate(js_env_t *env, js_callback_info_t *info) {
   int err;
 
   size_t argc = 1;
@@ -406,7 +394,7 @@ bare_timers_immediate (js_env_t *env, js_callback_info_t *info) {
 }
 
 static js_value_t *
-bare_timers_exports (js_env_t *env, js_value_t *exports) {
+bare_timers_exports(js_env_t *env, js_value_t *exports) {
   int err;
 
 #define V(name, fn) \
@@ -419,7 +407,6 @@ bare_timers_exports (js_env_t *env, js_value_t *exports) {
   }
 
   V("init", bare_timers_init)
-  V("destroy", bare_timers_destroy)
   V("ref", bare_timers_ref)
   V("unref", bare_timers_unref)
   V("start", bare_timers_start)
diff --git a/index.js b/index.js
index 9e985bb..88735e3 100644
--- a/index.js
+++ b/index.js
@@ -135,7 +135,7 @@ const immediates = new TimerList(0)
 
 const handle = binding.init(ontimer, onimmediate)
 
-Bare.on('idle', pause).on('resume', resume).on('exit', destroy)
+Bare.on('idle', pause).on('resume', resume)
 
 let refs = 0
 let garbage = 0
@@ -143,13 +143,6 @@ let nextExpiry = 0
 let ticks = 1
 let triggered = 0
 let paused = false
-let destroyed = false
-
-function destroy() {
-  if (destroyed) return
-  binding.destroy(handle)
-  destroyed = true
-}
 
 function pause() {
   if (paused) return
@@ -178,12 +171,12 @@ function tick() {
 }
 
 function cancelTimer() {
-  if (paused || destroyed || ticks === triggered) return
+  if (paused || ticks === triggered) return
   binding.stop(handle)
 }
 
 function updateTimer(ms) {
-  if (paused || destroyed || ticks === triggered) return
+  if (paused || ticks === triggered) return
   binding.start(handle, ms)
 }
 
diff --git a/package.json b/package.json
index 7258d9e..8d29a77 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "bare-timers",
-  "version": "2.2.0",
+  "version": "3.0.0-0",
   "description": "Native timers for Javascript",
   "exports": {
     ".": "./index.js",
@@ -29,6 +29,9 @@
     "url": "https://github.com/holepunchto/bare-timers/issues"
   },
   "homepage": "https://github.com/holepunchto/bare-timers#readme",
+  "engines": {
+    "bare": ">=1.7.0"
+  },
   "dependencies": {
     "tiny-binary-heap": "^1.1.0"
   },