diff --git a/package.json b/package.json
index c7180c1..d2fc740 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
     "express": "^4.16.3",
     "express-sslify": "^1.2.0",
     "firebase-admin": "^5.12.1",
-    "nodemailer": "^4.6.8",
+    "nodemailer": "^6.4.16",
     "winston": "^3.1.0",
     "winston-daily-rotate-file": "^3.5.1"
   },
diff --git a/yarn.lock b/yarn.lock
index 17d47bd..49fe058 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1091,7 +1091,7 @@ empower@^1.3.0:
 
 enabled@1.0.x:
   version "1.0.2"
-  resolved "http://registry.npmjs.org/enabled/-/enabled-1.0.2.tgz#965f6513d2c2d1c5f4652b64a2e3396467fc2f93"
+  resolved "https://registry.npmjs.org/enabled/-/enabled-1.0.2.tgz#965f6513d2c2d1c5f4652b64a2e3396467fc2f93"
   dependencies:
     env-variable "0.0.x"
 
@@ -1465,7 +1465,7 @@ fbjs@^0.8.16:
 
 fecha@^2.3.3:
   version "2.3.3"
-  resolved "http://registry.npmjs.org/fecha/-/fecha-2.3.3.tgz#948e74157df1a32fd1b12c3a3c3cdcb6ec9d96cd"
+  resolved "https://registry.npmjs.org/fecha/-/fecha-2.3.3.tgz#948e74157df1a32fd1b12c3a3c3cdcb6ec9d96cd"
 
 figures@^2.0.0:
   version "2.0.0"
@@ -2577,9 +2577,9 @@ node-pre-gyp@^0.10.0:
     semver "^5.3.0"
     tar "^4"
 
-nodemailer@^4.6.8:
-  version "4.6.8"
-  resolved "https://registry.yarnpkg.com/nodemailer/-/nodemailer-4.6.8.tgz#f82fb407828bf2e76d92acc34b823d83e774f89c"
+nodemailer@^6.4.16:
+  version "6.4.16"
+  resolved "https://registry.yarnpkg.com/nodemailer/-/nodemailer-6.4.16.tgz#5cb6391b1d79ab7eff32d6f9f48366b5a7117293"
 
 nopt@^4.0.1:
   version "4.0.1"