diff --git a/lib/crypto/crypto.js b/lib/crypto/crypto.js
index 01d3c710..5b73aacd 100644
--- a/lib/crypto/crypto.js
+++ b/lib/crypto/crypto.js
@@ -274,11 +274,11 @@ crypto.encrypt = co(function* encrypt(data, passphrase, iv) {
   try {
     data = crypto.encipher(data, key, iv);
   } catch (e) {
-    key.fill(0);
+    crypto.cleanse(key);
     throw e;
   }
 
-  key.fill(0);
+  crypto.cleanse(key);
 
   return data;
 });
@@ -328,11 +328,11 @@ crypto.decrypt = co(function* decrypt(data, passphrase, iv) {
   try {
     data = crypto.decipher(data, key, iv);
   } catch (e) {
-    key.fill(0);
+    crypto.cleanse(key);
     throw e;
   }
 
-  key.fill(0);
+  crypto.cleanse(key);
 
   return data;
 });