diff --git a/package.json b/package.json
index e950e1d..7b90f6e 100644
--- a/package.json
+++ b/package.json
@@ -33,7 +33,7 @@
   },
   "dependencies": {
     "elliptic": "^6.5.4",
-    "node-addon-api": "^2.0.0",
+    "node-addon-api": "^3.2.1",
     "node-gyp-build": "^4.2.0"
   },
   "devDependencies": {
diff --git a/src/secp256k1.cc b/src/secp256k1.cc
index e97d4a6..40ea6a5 100644
--- a/src/secp256k1.cc
+++ b/src/secp256k1.cc
@@ -26,8 +26,7 @@
   } while (0)
 
 // Secp256k1
-Napi::FunctionReference Secp256k1Addon::constructor;
-unsigned int Secp256k1Addon::secp256k1_context_flags =
+const unsigned int Secp256k1Addon::secp256k1_context_flags =
     SECP256K1_CONTEXT_SIGN | SECP256K1_CONTEXT_VERIFY;
 
 Napi::Value Secp256k1Addon::Init(Napi::Env env) {
@@ -66,8 +65,9 @@ Napi::Value Secp256k1Addon::Init(Napi::Env env) {
           InstanceMethod("ecdh", &Secp256k1Addon::ECDH),
       });
 
-  constructor = Napi::Persistent(func);
-  constructor.SuppressDestruct();
+  Napi::FunctionReference* constructor = new Napi::FunctionReference();
+  *constructor = Napi::Persistent(func);
+  env.SetInstanceData<Napi::FunctionReference>(constructor);
 
   return func;
 }
diff --git a/src/secp256k1.h b/src/secp256k1.h
index 6dabbf3..5f3e125 100644
--- a/src/secp256k1.h
+++ b/src/secp256k1.h
@@ -28,8 +28,7 @@ class Secp256k1Addon : public Napi::ObjectWrap<Secp256k1Addon> {
   };
 
  private:
-  static Napi::FunctionReference constructor;
-  static unsigned int secp256k1_context_flags;
+  static const unsigned int secp256k1_context_flags;
   const secp256k1_context* ctx_;
   ECDSASignData ecdsa_sign_data;
   ECDHData ecdh_data;