diff --git a/package-lock.json b/package-lock.json
index 13e7228..25ac154 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1283,9 +1283,9 @@
       "integrity": "sha1-odePw6UEdMuAhF07O24dpJpEbo4="
     },
     "lodash": {
-      "version": "4.17.10",
-      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.10.tgz",
-      "integrity": "sha512-UejweD1pDoXu+AD825lWwp4ZGtSwgnpZxb3JDViD7StjQz+Nb/6l093lx4OQ0foGWNRoc19mWy7BzL+UAK2iVg=="
+      "version": "4.17.21",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
+      "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg=="
     },
     "lodash.includes": {
       "version": "4.3.0",
@@ -1476,6 +1476,7 @@
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
       "integrity": "sha1-WDsap3WWHUsROsF9nFC6753Xa9E=",
+      "optional": true,
       "requires": {
         "wrappy": "1"
       }
@@ -1920,7 +1921,8 @@
     "wrappy": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
-      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
+      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
+      "optional": true
     },
     "yargs": {
       "version": "3.10.0",
diff --git a/package.json b/package.json
index a5e64de..b2419a7 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
     "http-errors": "~1.6.2",
     "jade": "~1.11.0",
     "jsonwebtoken": "^8.3.0",
-    "lodash": "^4.17.10",
+    "lodash": "^4.17.21",
     "morgan": "~1.9.0"
   },
   "devDependencies": {