diff --git a/.DS_Store b/.DS_Store
index 081ed9b..975e9c2 100644
Binary files a/.DS_Store and b/.DS_Store differ
diff --git a/.projenrc.ts b/.projenrc.ts
index 1060601..0d10732 100644
--- a/.projenrc.ts
+++ b/.projenrc.ts
@@ -7,9 +7,10 @@ const project = new typescript.TypeScriptProject({
 
   // github
   github: true,
-  authorName: 'Fluidkey',
+  authorName: 'Fluid Privacy SA',
   authorEmail: 'it@fluidkey.com',
   gitignore: ['.idea/', '.env', '.yalc'],
+  license: 'MIT',
 
   // NPMjs Configuration
   authorOrganization: true,
diff --git a/LICENSE b/LICENSE
index d9c63e1..7056b07 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,5 +1,3 @@
-MIT License
-
 Copyright (c) 2024 Fluid Privacy SA
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
diff --git a/package.json b/package.json
index 418112c..ae82aca 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
     "projen": "npx projen"
   },
   "author": {
-    "name": "Fluidkey",
+    "name": "Fluid Privacy SA",
     "email": "it@fluidkey.com",
     "organization": true
   },
@@ -46,7 +46,7 @@
     "viem": "1.21.4"
   },
   "main": "lib/index.js",
-  "license": "Apache-2.0",
+  "license": "MIT",
   "version": "0.0.0",
   "jest": {
     "testMatch": [
diff --git a/src/extractViewingPrivateKeyNode.ts b/src/extractViewingPrivateKeyNode.ts
index 4bb8e71..3186680 100644
--- a/src/extractViewingPrivateKeyNode.ts
+++ b/src/extractViewingPrivateKeyNode.ts
@@ -22,9 +22,9 @@ export function extractViewingPrivateKeyNode(
   // Convert the private viewing key to Uint8Array
   const uint8PrivateViewingKey = toBytes(privateViewingKey);
 
-  // generate the master HDKey from the private viewing key
+  // Generate the master HDKey from the private viewing key
   const hdkey = HDKey.fromMasterSeed(uint8PrivateViewingKey);
 
-  // derive the node m/5564'/N to be shared with the server
+  // Derive the node m/5564'/N to be shared with the server
   return hdkey.derive(`m/5564'/${node}'`);
 }
diff --git a/src/predictStealthSafeAddress.ts b/src/predictStealthSafeAddress.ts
index 5fcac57..9cf9395 100644
--- a/src/predictStealthSafeAddress.ts
+++ b/src/predictStealthSafeAddress.ts
@@ -15,6 +15,7 @@ import * as chains from 'viem/chains';
  * @param transport (optional) a custom viem transport to use for the simulation
  * @return Promise<{ stealthSafeAddress }> the predicted Safe address (not deployed)
  */
+
 export async function predictStealthSafeAddress({
   chainId,
   threshold,
diff --git a/test/extractViewingPrivateKeyNode.test.ts b/test/extractViewingPrivateKeyNode.test.ts
index 3191345..e827456 100644
--- a/test/extractViewingPrivateKeyNode.test.ts
+++ b/test/extractViewingPrivateKeyNode.test.ts
@@ -51,4 +51,10 @@ describe('extractPrivateViewingKeyNode', () => {
     expect(Array.from(result.privateKey!)).toEqual(expectedPrivateKey);
     expect(Array.from(result.publicKey!)).toEqual(expectedPublicKey);
   });
+
+  it('should throw an error if the private viewing key is not a valid hex string', () => {
+    expect(() => extractViewingPrivateKeyNode('0xinvalid')).toThrow(
+      'Hex private viewing key is not valid.',
+    );
+  });
 });