diff --git a/package.json b/package.json
index ccc2fc0..1a434ce 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
     "immutability-helper": "^2.4.0",
     "jade": "~1.11.0",
     "jwt-simple": "^0.5.1",
-    "lodash": "^4.17.4",
+    "lodash": "^4.17.21",
     "mongoose": "^4.12.1",
     "morgan": "~1.9.0",
     "nodemon": "^1.12.1",
diff --git a/yarn.lock b/yarn.lock
index 4dfa339..501a933 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1806,9 +1806,9 @@ lodash.restparam@^3.0.0:
   version "3.6.1"
   resolved "https://registry.yarnpkg.com/lodash.restparam/-/lodash.restparam-3.6.1.tgz#936a4e309ef330a7645ed4145986c85ae5b20805"
 
-lodash@^4.14.0, lodash@^4.17.4:
-  version "4.17.4"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.4.tgz#78203a4d1c328ae1d86dca6460e369b57f4055ae"
+lodash@^4.14.0, lodash@^4.17.21, lodash@^4.17.4:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
 
 loose-envify@^1.0.0:
   version "1.3.1"