diff --git a/package-lock.json b/package-lock.json
index 420241d..abe3c94 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2425,9 +2425,9 @@
       }
     },
     "nodemailer": {
-      "version": "4.6.4",
-      "resolved": "https://registry.npmjs.org/nodemailer/-/nodemailer-4.6.4.tgz",
-      "integrity": "sha512-SD4uuX7NMzZ5f5m1XHDd13J4UC3SmdJk8DsmU1g6Nrs5h3x9LcXr6EBPZIqXRJ3LrF7RdklzGhZRF/TuylTcLg=="
+      "version": "6.4.16",
+      "resolved": "https://registry.npmjs.org/nodemailer/-/nodemailer-6.4.16.tgz",
+      "integrity": "sha512-68K0LgZ6hmZ7PVmwL78gzNdjpj5viqBdFqKrTtr9bZbJYj6BRj5W6WGkxXrEnUl3Co3CBXi3CZBUlpV/foGnOQ=="
     },
     "nopt": {
       "version": "4.0.1",
@@ -2512,6 +2512,7 @@
           "version": "0.1.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "kind-of": "^3.0.2",
             "longest": "^1.0.1",
@@ -3668,7 +3669,8 @@
         "longest": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "loose-envify": {
           "version": "1.3.1",
diff --git a/package.json b/package.json
old mode 100755
new mode 100644
index eccaf8c..ebed057
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
     "morgan": "~1.9.0",
     "multer": "^1.3.0",
     "mysql2": "^1.4.2",
-    "nodemailer": "^4.5.0",
+    "nodemailer": "^6.4.16",
     "pg": "^7.4.1",
     "sequelize": "^4.13.8",
     "sequelize-cli": "^4.0.0",