diff --git a/backend/package-lock.json b/backend/package-lock.json
index 1e14b8f..3567ca5 100644
--- a/backend/package-lock.json
+++ b/backend/package-lock.json
@@ -116,7 +116,7 @@
       "dependencies": {
         "whatwg-fetch": {
           "version": "2.0.4",
-          "resolved": "http://registry.npmjs.org/whatwg-fetch/-/whatwg-fetch-2.0.4.tgz",
+          "resolved": "https://registry.npmjs.org/whatwg-fetch/-/whatwg-fetch-2.0.4.tgz",
           "integrity": "sha512-dcQ1GWpOD/eEQ97k66aiEVpNnapVj90/+R+SXTPYGHpYBBypfKJEQjLrvMZ7YXbKm21gXd4NcuxUTjiv1YtLng=="
         }
       }
@@ -1044,9 +1044,9 @@
       "integrity": "sha512-MOd8pV3fxENbryESLgVIeaGKrdl+uaYhCSSVkjeOb/31/njTpcis5aWfdqgNlHIrKOLRbMnfPINPOML2CIFeXA=="
     },
     "nodemailer": {
-      "version": "4.7.0",
-      "resolved": "https://registry.npmjs.org/nodemailer/-/nodemailer-4.7.0.tgz",
-      "integrity": "sha512-IludxDypFpYw4xpzKdMAozBSkzKHmNBvGanUREjJItgJ2NYcK/s8+PggVhj7c2yGFQykKsnnmv1+Aqo0ZfjHmw=="
+      "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/backend/package.json b/backend/package.json
index 55ce214..60aa4a5 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -16,6 +16,6 @@
     "firebase": "^5.5.9",
     "mustache": "^3.0.1",
     "node-fetch": "^2.3.0",
-    "nodemailer": "^4.7.0"
+    "nodemailer": "^6.4.16"
   }
 }