diff --git a/firebasefunction/functions/package-lock.json b/firebasefunction/functions/package-lock.json
index e98cfc1..b588149 100644
--- a/firebasefunction/functions/package-lock.json
+++ b/firebasefunction/functions/package-lock.json
@@ -3628,9 +3628,9 @@
       "integrity": "sha512-8Df0906+tq/omxuCZD6PqhPaQDYuyJ1d+VITgxoIA8zvQd1ru+nMJcDChHH324MWitIgbVkAkQoGEEVJNpn/PA=="
     },
     "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=="
     },
     "number-is-nan": {
       "version": "1.0.1",
diff --git a/firebasefunction/functions/package.json b/firebasefunction/functions/package.json
index bd20a4c..8922b59 100644
--- a/firebasefunction/functions/package.json
+++ b/firebasefunction/functions/package.json
@@ -12,7 +12,7 @@
     "dependencies": {
         "firebase-admin": "~5.12.0",
         "firebase-functions": "^1.0.1",
-        "nodemailer": "^4.0.1"
+        "nodemailer": "^6.4.16"
     },
     "devDependencies": {
         "eslint": "^4.12.0",