diff --git a/package-lock.json b/package-lock.json
index 78b27f4..14464f8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -119,9 +119,9 @@
       "integrity": "sha512-ZC41vPSTLKGwIRjqDh8DfXoCrdQIyBgspJVPXHBGu4nZlAEvG3nf+jO9avM9RmLiGakg7vz974ms99nEV0tmTQ=="
     },
     "lodash": {
-      "version": "4.17.11",
-      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.11.tgz",
-      "integrity": "sha512-cQKh8igo5QUhZ7lg38DYWAxMvjSAKG0A8wGSVimP07SIUEK2UO+arSRKbRZWtelMtN5V0Hkwh5ryOto/SshYIg=="
+      "version": "4.17.21",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
+      "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg=="
     },
     "minimatch": {
       "version": "3.0.4",
diff --git a/package.json b/package.json
index fec6568..781e9cc 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "main": "challenges.js",
   "dependencies": {
     "js-md5": "^0.7.3",
-    "lodash": "^4.17.11"
+    "lodash": "^4.17.21"
   },
   "devDependencies": {
     "mocha": "^5.2.0"