diff --git a/.gitignore b/.gitignore
index 7d7e2bc1..c11ba12e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@
 node_modules
 
 .DS_Store
+.idea/
diff --git a/lib/main.js b/lib/main.js
index 84f81a1e..c2e96d5f 100644
--- a/lib/main.js
+++ b/lib/main.js
@@ -237,9 +237,9 @@ function decrypt (encrypted, keyStr) {
   const key = Buffer.from(keyStr.slice(-64), 'hex')
   let ciphertext = Buffer.from(encrypted, 'base64')
 
-  const nonce = ciphertext.slice(0, 12)
-  const authTag = ciphertext.slice(-16)
-  ciphertext = ciphertext.slice(12, -16)
+  const nonce = ciphertext.subarray(0, 12)
+  const authTag = ciphertext.subarray(-16)
+  ciphertext = ciphertext.subarray(12, -16)
 
   try {
     const aesgcm = crypto.createDecipheriv('aes-256-gcm', key, nonce)