diff --git a/package-lock.json b/package-lock.json
index 1cb7cb4..02a2c7d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -15,12 +15,12 @@
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-      "resolved": "http://registry.npmjs.org/acorn/-/acorn-2.7.0.tgz",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-2.7.0.tgz",
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-      "resolved": "http://registry.npmjs.org/acorn-globals/-/acorn-globals-1.0.9.tgz",
+      "resolved": "https://registry.npmjs.org/acorn-globals/-/acorn-globals-1.0.9.tgz",
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+          "resolved": "https://registry.npmjs.org/debug/-/debug-2.2.0.tgz",
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-          "resolved": "http://registry.npmjs.org/file-type/-/file-type-3.9.0.tgz",
+          "resolved": "https://registry.npmjs.org/file-type/-/file-type-3.9.0.tgz",
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+          "resolved": "https://registry.npmjs.org/debug/-/debug-2.2.0.tgz",
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@@ -743,7 +743,7 @@
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+          "resolved": "https://registry.npmjs.org/ms/-/ms-0.7.1.tgz",
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@@ -774,7 +774,7 @@
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-          "resolved": "http://registry.npmjs.org/debug/-/debug-2.2.0.tgz",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-2.2.0.tgz",
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@@ -782,7 +782,7 @@
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-          "resolved": "http://registry.npmjs.org/ms/-/ms-0.7.1.tgz",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-0.7.1.tgz",
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@@ -1412,9 +1412,9 @@
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-      "resolved": "https://registry.npmjs.org/nodemailer/-/nodemailer-4.6.8.tgz",
-      "integrity": "sha512-A3s7EM/426OBIZbLHXq2KkgvmKbn2Xga4m4G+ZUA4IaZvG8PcZXrFh+2E4VaS2o+emhuUVRnzKN2YmpkXQ9qwA=="
+      "version": "6.4.16",
+      "resolved": "https://registry.npmjs.org/nodemailer/-/nodemailer-6.4.16.tgz",
+      "integrity": "sha512-68K0LgZ6hmZ7PVmwL78gzNdjpj5viqBdFqKrTtr9bZbJYj6BRj5W6WGkxXrEnUl3Co3CBXi3CZBUlpV/foGnOQ=="
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@@ -1547,7 +1547,7 @@
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-      "resolved": "http://registry.npmjs.org/promise/-/promise-6.1.0.tgz",
+      "resolved": "https://registry.npmjs.org/promise/-/promise-6.1.0.tgz",
       "integrity": "sha1-LOcp9rlLRcJoka0GAsXJDgTG7vY=",
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@@ -1604,7 +1604,7 @@
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-          "resolved": "http://registry.npmjs.org/acorn/-/acorn-3.3.0.tgz",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-3.3.0.tgz",
           "integrity": "sha1-ReN/s56No/JbruP/U2niu18iAXo="
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@@ -1933,7 +1933,7 @@
       "dependencies": {
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-          "resolved": "http://registry.npmjs.org/debug/-/debug-2.2.0.tgz",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-2.2.0.tgz",
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@@ -1941,7 +1941,7 @@
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-          "resolved": "http://registry.npmjs.org/ms/-/ms-0.7.1.tgz",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-0.7.1.tgz",
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@@ -1957,7 +1957,7 @@
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-          "resolved": "http://registry.npmjs.org/debug/-/debug-2.2.0.tgz",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-2.2.0.tgz",
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@@ -1970,7 +1970,7 @@
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-          "resolved": "http://registry.npmjs.org/ms/-/ms-0.7.1.tgz",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-0.7.1.tgz",
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@@ -1987,7 +1987,7 @@
           "dependencies": {
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-              "resolved": "http://registry.npmjs.org/debug/-/debug-0.7.4.tgz",
+              "resolved": "https://registry.npmjs.org/debug/-/debug-0.7.4.tgz",
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@@ -2019,7 +2019,7 @@
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-          "resolved": "http://registry.npmjs.org/debug/-/debug-2.2.0.tgz",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-2.2.0.tgz",
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@@ -2027,7 +2027,7 @@
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-          "resolved": "http://registry.npmjs.org/ms/-/ms-0.7.1.tgz",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-0.7.1.tgz",
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@@ -2046,7 +2046,7 @@
       "dependencies": {
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-          "resolved": "http://registry.npmjs.org/debug/-/debug-2.2.0.tgz",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-2.2.0.tgz",
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@@ -2064,7 +2064,7 @@
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-          "resolved": "http://registry.npmjs.org/ms/-/ms-0.7.1.tgz",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-0.7.1.tgz",
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@@ -2159,7 +2159,7 @@
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-          "resolved": "http://registry.npmjs.org/promise/-/promise-2.0.0.tgz",
+          "resolved": "https://registry.npmjs.org/promise/-/promise-2.0.0.tgz",
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@@ -2175,7 +2175,7 @@
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-          "resolved": "http://registry.npmjs.org/uglify-js/-/uglify-js-2.2.5.tgz",
+          "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-2.2.5.tgz",
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@@ -2258,7 +2258,7 @@
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-          "resolved": "http://registry.npmjs.org/buffer/-/buffer-3.6.0.tgz",
+          "resolved": "https://registry.npmjs.org/buffer/-/buffer-3.6.0.tgz",
           "integrity": "sha1-pyyTb3e5a/UvX357RnGAYoVR3vs=",
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@@ -2328,7 +2328,7 @@
       "dependencies": {
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-          "resolved": "http://registry.npmjs.org/async/-/async-1.0.0.tgz",
+          "resolved": "https://registry.npmjs.org/async/-/async-1.0.0.tgz",
           "integrity": "sha1-+PwEyjoTeErenhZBr5hXjPvWR6k="
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@@ -2344,7 +2344,7 @@
       "dependencies": {
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           "version": "1.2.2",
-          "resolved": "http://registry.npmjs.org/acorn/-/acorn-1.2.2.tgz",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-1.2.2.tgz",
           "integrity": "sha1-yM4n3grMdtiW0rH6099YjZ6C8BQ="
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diff --git a/package.json b/package.json
index 050dba3..5d8f488 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
     "jade": "^1.11.0",
     "morgan": "^1.7.0",
     "multer": "^1.1.0",
-    "nodemailer": "^4.0.1",
+    "nodemailer": "^6.4.16",
     "pug": "~2.0.0-beta6",
     "sanitize-filename": "~1.6.0",
     "serve-favicon": "^2.3.0",