diff --git a/binding.cc b/binding.cc
index 69f66e2..307a559 100644
--- a/binding.cc
+++ b/binding.cc
@@ -121,7 +121,7 @@ NAN_METHOD(decode) {
   }
   v8::Local<v8::Object> sourceHandle = info[0].As<v8::Object>();
   v8::Local<v8::Object> targetHandle = info[1].As<v8::Object>();
-  const uint32_t flags = info[2]->Uint32Value();
+  const uint32_t flags = Nan::To<int32_t>(info[2]).FromJust();
   const uint32_t sourceLength = node::Buffer::Length(sourceHandle);
   const uint32_t targetLength = node::Buffer::Length(targetHandle);
   if (targetLength < (ceil_div(sourceLength, 4) * 3)) {
@@ -231,7 +231,7 @@ NAN_METHOD(encode) {
   }
   v8::Local<v8::Object> sourceHandle = info[0].As<v8::Object>();
   v8::Local<v8::Object> targetHandle = info[1].As<v8::Object>();
-  const uint32_t flags = info[2]->Uint32Value();
+  const uint32_t flags = Nan::To<int32_t>(info[2]).FromJust();
   const uint32_t sourceLength = node::Buffer::Length(sourceHandle);
   const uint32_t targetLength = node::Buffer::Length(targetHandle);
   if (targetLength < encodeTargetLength(sourceLength, flags)) {
diff --git a/package-lock.json b/package-lock.json
index c853ad7..d06ba3f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5,14 +5,14 @@
   "requires": true,
   "dependencies": {
     "@ronomon/queue": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/@ronomon/queue/-/queue-3.0.0.tgz",
-      "integrity": "sha512-+Dnc8cNXa0mI1cD+YdA3mmQP8j1CjQKXfILiXgZGWAtauMIUxuhRgnOLgabKjEj+Wa8r2rQKsaNaDayxauImGQ=="
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/@ronomon/queue/-/queue-3.0.1.tgz",
+      "integrity": "sha512-STcqSvk+c7ArMrZgYxhM92p6O6F7t0SUbGr+zm8s9fJple5EdJAMwP3dXqgdXeF95xWhBpha5kjEqNAIdI0r4w=="
     },
     "nan": {
-      "version": "2.11.0",
-      "resolved": "https://registry.npmjs.org/nan/-/nan-2.11.0.tgz",
-      "integrity": "sha512-F4miItu2rGnV2ySkXOQoA8FKz/SR2Q2sWP0sbTxNxz/tuokeC8WxOhPMcwi0qIyGtVn/rrSeLbvVkznqCdwYnw=="
+      "version": "2.14.1",
+      "resolved": "https://registry.npmjs.org/nan/-/nan-2.14.1.tgz",
+      "integrity": "sha512-isWHgVjnFjh2x2yuJ/tj3JbwoHu3UC2dX5G/88Cm24yB6YopVgxvBObDY7n5xW6ExmFhJpSEQqFPvq9zaXc8Jw=="
     }
   }
 }
diff --git a/package.json b/package.json
index bd1012e..53594c9 100644
--- a/package.json
+++ b/package.json
@@ -32,6 +32,6 @@
   },
   "dependencies": {
     "@ronomon/queue": "^3.0.0",
-    "nan": "^2.11.0"
+    "nan": "^2.14.1"
   }
 }