diff --git a/functions/package-lock.json b/functions/package-lock.json
index a61e9d9..e4e4b14 100644
--- a/functions/package-lock.json
+++ b/functions/package-lock.json
@@ -1518,9 +1518,9 @@
       "integrity": "sha512-8Df0906+tq/omxuCZD6PqhPaQDYuyJ1d+VITgxoIA8zvQd1ru+nMJcDChHH324MWitIgbVkAkQoGEEVJNpn/PA=="
     },
     "nodemailer": {
-      "version": "6.3.0",
-      "resolved": "https://registry.npmjs.org/nodemailer/-/nodemailer-6.3.0.tgz",
-      "integrity": "sha512-TEHBNBPHv7Ie/0o3HXnb7xrPSSQmH1dXwQKRaMKDBGt/ZN54lvDVujP6hKkO/vjkIYL9rK8kHSG11+G42Nhxuw=="
+      "version": "6.4.16",
+      "resolved": "https://registry.npmjs.org/nodemailer/-/nodemailer-6.4.16.tgz",
+      "integrity": "sha512-68K0LgZ6hmZ7PVmwL78gzNdjpj5viqBdFqKrTtr9bZbJYj6BRj5W6WGkxXrEnUl3Co3CBXi3CZBUlpV/foGnOQ=="
     },
     "object-assign": {
       "version": "4.1.1",
diff --git a/functions/package.json b/functions/package.json
index 988b55c..3b24ea3 100644
--- a/functions/package.json
+++ b/functions/package.json
@@ -16,7 +16,7 @@
   "dependencies": {
     "firebase-admin": "^8.0.0",
     "firebase-functions": "^3.1.0",
-    "nodemailer": "^6.3.0"
+    "nodemailer": "^6.4.16"
   },
   "devDependencies": {
     "@types/nodemailer": "^6.2.1",
diff --git a/functions/yarn.lock b/functions/yarn.lock
index 9e47b1c..487d04f 100644
--- a/functions/yarn.lock
+++ b/functions/yarn.lock
@@ -1242,10 +1242,10 @@ node-forge@^0.8.0:
   resolved "https://registry.yarnpkg.com/node-forge/-/node-forge-0.8.5.tgz#57906f07614dc72762c84cef442f427c0e1b86ee"
   integrity sha512-vFMQIWt+J/7FLNyKouZ9TazT74PRV3wgv9UT4cRjC8BffxFbKXkgIWR42URCPSnHm/QDz6BOlb2Q0U4+VQT67Q==
 
-nodemailer@^6.3.0:
-  version "6.3.0"
-  resolved "https://registry.yarnpkg.com/nodemailer/-/nodemailer-6.3.0.tgz#a89b0c62d3937bdcdeecbf55687bd7911b627e12"
-  integrity sha512-TEHBNBPHv7Ie/0o3HXnb7xrPSSQmH1dXwQKRaMKDBGt/ZN54lvDVujP6hKkO/vjkIYL9rK8kHSG11+G42Nhxuw==
+nodemailer@^6.4.16:
+  version "6.4.16"
+  resolved "https://registry.yarnpkg.com/nodemailer/-/nodemailer-6.4.16.tgz#5cb6391b1d79ab7eff32d6f9f48366b5a7117293"
+  integrity sha512-68K0LgZ6hmZ7PVmwL78gzNdjpj5viqBdFqKrTtr9bZbJYj6BRj5W6WGkxXrEnUl3Co3CBXi3CZBUlpV/foGnOQ==
 
 object-assign@^4:
   version "4.1.1"