diff --git a/package.json b/package.json
index 7ba58de..720dc35 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
     "hubot-slack": "^4.3.4",
     "hubot-standup-alarm": "^0.1.0",
     "hubot-youtube": "^1.0.2",
-    "lodash": "^4.17.4",
+    "lodash": "^4.17.21",
     "moment": "^2.10.6",
     "underscore": "*"
   },
diff --git a/yarn.lock b/yarn.lock
index 5f613fc..3aaa23b 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -650,10 +650,10 @@ jsprim@^1.2.2:
     json-schema "0.2.3"
     verror "1.10.0"
 
-lodash@^4.13.1, lodash@^4.17.10, lodash@^4.17.4:
-  version "4.17.11"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.11.tgz#b39ea6229ef607ecd89e2c8df12536891cac9b8d"
-  integrity sha512-cQKh8igo5QUhZ7lg38DYWAxMvjSAKG0A8wGSVimP07SIUEK2UO+arSRKbRZWtelMtN5V0Hkwh5ryOto/SshYIg==
+lodash@^4.13.1, lodash@^4.17.10, lodash@^4.17.21:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
+  integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
 
 log@1.4.0:
   version "1.4.0"