diff --git a/package.json b/package.json
index 427b76f..05b2e11 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
     "cors": "^2.7.1",
     "express": "^4.14.0",
     "jsonwebtoken": "^7.1.6",
-    "lodash": "^4.13.1",
+    "lodash": "^4.17.21",
     "mkdirp": "^0.5.1",
     "mongoose": "^4.5.4",
     "mongoose-unique-validator": "^1.0.2",
diff --git a/yarn.lock b/yarn.lock
index 1122e37..8f5ceaf 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1655,9 +1655,9 @@ lodash.restparam@^3.0.0:
   version "3.6.1"
   resolved "http://registry.npm.taobao.org/lodash.restparam/download/lodash.restparam-3.6.1.tgz#936a4e309ef330a7645ed4145986c85ae5b20805"
 
-lodash@^4.0.0, lodash@^4.13.1, lodash@^4.14.0, lodash@^4.3.0:
-  version "4.17.4"
-  resolved "http://registry.npm.taobao.org/lodash/download/lodash-4.17.4.tgz#78203a4d1c328ae1d86dca6460e369b57f4055ae"
+lodash@^4.0.0, lodash@^4.14.0, lodash@^4.17.21, lodash@^4.3.0:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
 
 lowercase-keys@^1.0.0:
   version "1.0.0"