diff --git a/.travis.yml b/.travis.yml
index 6a774c4..f7a7544 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -21,6 +21,7 @@ env:
     - export NODE_VERSION="4"
     - export NODE_VERSION="5"
     - export NODE_VERSION="6"
+    - export NODE_VERSION="7"
   global:
     - node_pre_gyp_region="eu-central-1"
 
diff --git a/appveyor.yml b/appveyor.yml
index eb3ce33..11ae3e8 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -5,6 +5,10 @@ environment:
     secure: jJxKoyWputzRz2EjAT9i/vBzYt2+lcjKZ5D6O5TBaS9+anpYHn2XWbOut5dkOgh0
   node_pre_gyp_region: eu-central-1
   matrix:
+    - NODE_VERSION: 7
+      platform: x64
+    - NODE_VERSION: 7
+      platform: x86
     - NODE_VERSION: 6
       platform: x64
     - NODE_VERSION: 6
diff --git a/binding.gyp b/binding.gyp
index ba0425b..01fe42e 100644
--- a/binding.gyp
+++ b/binding.gyp
@@ -2,7 +2,7 @@
   'targets': [
     {
       'target_name': 'profiler',
-      'win_delay_load_hook': 'true',
+      'win_delay_load_hook': 'false',
       'sources': [
         'src/profiler.cc',
         'src/cpu_profiler.cc',
diff --git a/package.json b/package.json
index 6557fb9..fb11fab 100644
--- a/package.json
+++ b/package.json
@@ -34,8 +34,8 @@
   },
   "main": "v8-profiler",
   "dependencies": {
-    "nan": "^2.3.2",
-    "node-pre-gyp": "^0.6.5"
+    "nan": "^2.5.1",
+    "node-pre-gyp": "^0.6.34"
   },
   "devDependencies": {
     "aws-sdk": "^2.0.0",
diff --git a/src/heap_snapshot.cc b/src/heap_snapshot.cc
index f4e6873..aab70da 100644
--- a/src/heap_snapshot.cc
+++ b/src/heap_snapshot.cc
@@ -18,7 +18,6 @@ namespace nodex {
   using v8::Function;
   using v8::Value;
 
-
   Nan::Persistent<ObjectTemplate> Snapshot::snapshot_template_;
   Nan::Persistent<Object> Snapshot::snapshots;
 
@@ -43,11 +42,13 @@ namespace nodex {
     Local<Object> _root;
     Local<String> __root = Nan::New<String>("_root").ToLocalChecked();
     if (info.This()->Has(__root)) {
-      info.GetReturnValue().Set(info.This()->GetHiddenValue(__root));
+      Local<Value> root;
+      Nan::GetPrivate(info.This(), __root).ToLocal(&root);
+      info.GetReturnValue().Set(root);
     } else {
       void* ptr = Nan::GetInternalFieldPointer(info.This(), 0);
       Local<Value> _root = GraphNode::New(static_cast<HeapSnapshot*>(ptr)->GetRoot());
-      info.This()->SetHiddenValue(__root, _root);
+      Nan::SetPrivate(info.This(), __root, _root);
       info.GetReturnValue().Set(_root);
     }
   }