diff --git a/package-lock.json b/package-lock.json
index d956cbf..37049d4 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -108,9 +108,9 @@
       }
     },
     "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=="
     },
     "minimist": {
       "version": "1.2.0",
diff --git a/package.json b/package.json
index 1c17d61..fac6c30 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "dependencies": {
     "bluebird": "^3.5.1",
     "jubatus": "^0.9.9",
-    "lodash": "^4.17.11",
+    "lodash": "^4.17.21",
     "minimist": "^1.2.0"
   },
   "repository": {