diff --git a/package.json b/package.json
old mode 100755
new mode 100644
index 986dcd9..7364106
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
     "create-hmac": "^1.1.0",
     "diffie-hellman": "^5.0.0",
     "inherits": "^2.0.1",
-    "pbkdf2": "3.0.8",
+    "pbkdf2": "3.1.3",
     "public-encrypt": "^4.0.0"
   },
   "peerDependencies": {