diff --git a/package.json b/package.json
index cdfccfd..ad12f4c 100644
--- a/package.json
+++ b/package.json
@@ -5,5 +5,5 @@
     "keywords": [],
     "author": "Jeroen Janssen <jeroen.janssen@gmail.com>",
     "main": "./sdlmixer",
-    "engines": { "node": "0.4.x" }
+    "engine": "node >= 0.4.x" 
 }
diff --git a/src/async_uv.h b/src/async_uv.h
index b910ae6..a301412 100644
--- a/src/async_uv.h
+++ b/src/async_uv.h
@@ -1,11 +1,12 @@
 #ifndef NODE_SQLITE3_SRC_ASYNC_H
 #define NODE_SQLITE3_SRC_ASYNC_H
 
+#include <node_version.h>
 
 // Generic uv_async handler.
 template <class Item, class Parent> class Async {
     typedef void (*Callback)(Parent* parent, Item* item);
-
+    
 protected:
     uv_async_t watcher;
     pthread_mutex_t mutex;
@@ -13,15 +14,15 @@ template <class Item, class Parent> class Async {
     Callback callback;
 public:
     Parent* parent;
-
+    
 public:
     Async(Parent* parent_, Callback cb_)
-        : callback(cb_), parent(parent_) {
+    : callback(cb_), parent(parent_) {
         watcher.data = this;
         pthread_mutex_init(&mutex, NULL);
         uv_async_init(uv_default_loop(), &watcher, listener);
     }
-
+    
     static void listener(uv_async_t* handle, int status) {
         Async* async = static_cast<Async*>(handle->data);
         std::vector<Item*> rows;
@@ -29,11 +30,15 @@ template <class Item, class Parent> class Async {
         rows.swap(async->data);
         pthread_mutex_unlock(&async->mutex);
         for (unsigned int i = 0, size = rows.size(); i < size; i++) {
+#if NODE_VERSION_AT_LEAST(0, 7, 9)
+            uv_unref((uv_handle_t *)&async->watcher);
+#else
             uv_unref(uv_default_loop());
+#endif
             async->callback(async->parent, rows[i]);
         }
     }
-
+    
     static void close(uv_handle_t* handle) {
         assert(handle != NULL);
         assert(handle->data != NULL);
@@ -41,7 +46,7 @@ template <class Item, class Parent> class Async {
         delete async;
         handle->data = NULL;
     }
-
+    
     void finish() {
         // Need to call the listener again to ensure all items have been
         // processed. Is this a bug in uv_async? Feels like uv_close
@@ -49,27 +54,31 @@ template <class Item, class Parent> class Async {
         listener(&watcher, 0);
         uv_close((uv_handle_t*)&watcher, close);
     }
-
+    
     void add(Item* item) {
         // Make sure node runs long enough to deliver the messages.
+#if NODE_VERSION_AT_LEAST(0, 7, 9)
+        uv_ref((uv_handle_t *)&watcher);
+#else
         uv_ref(uv_default_loop());
+#endif
         pthread_mutex_lock(&mutex);
         data.push_back(item);
         pthread_mutex_unlock(&mutex);
     }
-
+    
     void send() {
         uv_async_send(&watcher);
     }
-
+    
     void send(Item* item) {
         add(item);
         send();
     }
-
+    
     ~Async() {
         pthread_mutex_destroy(&mutex);
     }
 };
 
-#endif
+#endif
\ No newline at end of file