diff --git a/package-lock.json b/package-lock.json
index 0b39d1a..a746b72 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1999,9 +1999,9 @@
       "dev": true
     },
     "nan": {
-      "version": "2.10.0",
-      "resolved": "https://registry.npmjs.org/nan/-/nan-2.10.0.tgz",
-      "integrity": "sha512-bAdJv7fBLhWC+/Bls0Oza+mvTaNQtP+1RyhhhvD95pgUJz6XM5IzgmxOkItJ9tkoCiplvAnXI1tNmmUD/eScyA=="
+      "version": "2.12.1",
+      "resolved": "https://registry.npmjs.org/nan/-/nan-2.12.1.tgz",
+      "integrity": "sha512-JY7V6lRkStKcKTvHO5NVSQRv+RV+FIL5pvDoLiAtSL9pKlC5x9PKQcZDsq7m4FO4d57mkhC6Z+QhAh3Jdk5JFw=="
     },
     "nanomatch": {
       "version": "1.2.13",
diff --git a/package.json b/package.json
index a7c9060..9c38a06 100644
--- a/package.json
+++ b/package.json
@@ -15,7 +15,7 @@
   "author": "Max Brunsfeld",
   "license": "MIT",
   "dependencies": {
-    "nan": "^2.10.0"
+    "nan": "^2.12.1"
   },
   "devDependencies": {
     "mocha": "^6.0.1",
diff --git a/src/main.cc b/src/main.cc
index f4a3930..288a65f 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -23,7 +23,7 @@ class Worker : public Nan::AsyncWorker {
 
   void HandleOKCallback() {
     Local<Value> argv[] = {Nan::New<Integer>(exit_code)};
-    callback->Call(1, argv);
+    callback->Call(1, argv, async_resource);
   }
 };
 
@@ -43,7 +43,8 @@ void SpawnAsAdmin(const Nan::FunctionCallbackInfo<Value>& info) {
     return;
   }
 
-  std::string command(*String::Utf8Value(info[0]));
+  Nan::Utf8String commandNan(info[0]);
+  std::string command(*commandNan, commandNan.length());
 
   if (!info[1]->IsArray()) {
     Nan::ThrowTypeError("Arguments must be an array");
@@ -60,7 +61,7 @@ void SpawnAsAdmin(const Nan::FunctionCallbackInfo<Value>& info) {
       return;
     }
 
-    args.push_back(std::string(*String::Utf8Value(js_arg)));
+    args.push_back(*Nan::Utf8String(js_arg));
   }
 
   bool test_mode = false;