diff --git a/package-lock.json b/package-lock.json
index 5e071e1..e5bd2d6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -63,6 +63,7 @@
       "version": "0.1.4",
       "resolved": "https://registry.npmjs.org/align-text/-/align-text-0.1.4.tgz",
       "integrity": "sha1-DNkKVhCT810KmSVsIrcGlDP60Rc=",
+      "optional": true,
       "requires": {
         "kind-of": "3.2.2",
         "longest": "1.0.1",
@@ -587,7 +588,8 @@
     "is-buffer": {
       "version": "1.1.5",
       "resolved": "https://registry.npmjs.org/is-buffer/-/is-buffer-1.1.5.tgz",
-      "integrity": "sha1-Hzsm72E7IUuIy8ojzGwB2Hlh7sw="
+      "integrity": "sha1-Hzsm72E7IUuIy8ojzGwB2Hlh7sw=",
+      "optional": true
     },
     "isarray": {
       "version": "1.0.0",
@@ -603,6 +605,7 @@
       "version": "3.2.2",
       "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-3.2.2.tgz",
       "integrity": "sha1-MeohpzS6ubuw8yRm2JOupR5KPGQ=",
+      "optional": true,
       "requires": {
         "is-buffer": "1.1.5"
       }
@@ -626,7 +629,8 @@
     "longest": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/longest/-/longest-1.0.1.tgz",
-      "integrity": "sha1-MKCy2jj3N3DoKUoNIuZiXtd9AJc="
+      "integrity": "sha1-MKCy2jj3N3DoKUoNIuZiXtd9AJc=",
+      "optional": true
     },
     "media-typer": {
       "version": "0.3.0",
@@ -779,9 +783,9 @@
       "integrity": "sha1-KzJxhOiZIQEXeyhWP7XnECrNDKk="
     },
     "nodemailer": {
-      "version": "4.0.1",
-      "resolved": "https://registry.npmjs.org/nodemailer/-/nodemailer-4.0.1.tgz",
-      "integrity": "sha1-uVhksH+s7oKH6CMu/9bx1W7HWrI="
+      "version": "6.4.16",
+      "resolved": "https://registry.npmjs.org/nodemailer/-/nodemailer-6.4.16.tgz",
+      "integrity": "sha512-68K0LgZ6hmZ7PVmwL78gzNdjpj5viqBdFqKrTtr9bZbJYj6BRj5W6WGkxXrEnUl3Co3CBXi3CZBUlpV/foGnOQ=="
     },
     "oauth": {
       "version": "0.9.15",
@@ -816,7 +820,8 @@
       }
     },
     "ot": {
-      "version": "git+https://github.com/Operational-Transformation/ot.js.git#8873b7e28e83f9adbf6c3a28ec639c9151a838ae"
+      "version": "git+https://github.com/Operational-Transformation/ot.js.git#8873b7e28e83f9adbf6c3a28ec639c9151a838ae",
+      "from": "git+https://github.com/Operational-Transformation/ot.js.git#8873b7e28e83f9adbf6c3a28ec639c9151a838ae"
     },
     "parseqs": {
       "version": "0.0.5",
@@ -951,7 +956,8 @@
     "repeat-string": {
       "version": "1.6.1",
       "resolved": "https://registry.npmjs.org/repeat-string/-/repeat-string-1.6.1.tgz",
-      "integrity": "sha1-jcrkcOHIirwtYA//Sndihtp15jc="
+      "integrity": "sha1-jcrkcOHIirwtYA//Sndihtp15jc=",
+      "optional": true
     },
     "require_optional": {
       "version": "1.0.1",
diff --git a/package.json b/package.json
index 8518cfc..22119a7 100644
--- a/package.json
+++ b/package.json
@@ -15,7 +15,7 @@
     "hbs": "~4.0.1",
     "mongoose": "^4.13.4",
     "morgan": "~1.8.1",
-    "nodemailer": "^4.0.1",
+    "nodemailer": "^6.4.16",
     "ot": "git+https://github.com/Operational-Transformation/ot.js.git",
     "passport": "^0.3.2",
     "passport-facebook": "^2.1.1",