diff --git a/package.json b/package.json
index 3a55f71a..a7138bc9 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
     "hexo-renderer-marked": "^2.0.0",
     "hexo-renderer-stylus": "^1.1.0",
     "hexo-server": "^1.0.0",
-    "lodash": "^4.17.13",
+    "lodash": "^4.17.21",
     "lunr": "^2.3.8",
     "node-sass": "4.13.1",
     "uuid": "^3.3.3"
diff --git a/yarn.lock b/yarn.lock
index 68b72e26..394177d7 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3603,10 +3603,10 @@ lodash@^3.6.0:
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-3.10.1.tgz#5bf45e8e49ba4189e17d482789dfd15bd140b7b6"
   integrity sha1-W/Rejkm6QYnhfUgnid/RW9FAt7Y=
 
-lodash@^4.0.0, lodash@^4.17.10, lodash@^4.17.11, lodash@^4.17.13, lodash@^4.17.14, lodash@^4.17.15, lodash@^4.17.4, lodash@~4.17.10:
-  version "4.17.15"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.15.tgz#b447f6670a0455bbfeedd11392eff330ea097548"
-  integrity sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A==
+lodash@^4.0.0, lodash@^4.17.10, lodash@^4.17.11, lodash@^4.17.14, lodash@^4.17.15, lodash@^4.17.21, lodash@^4.17.4, lodash@~4.17.10:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
+  integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
 
 longest@^1.0.1:
   version "1.0.1"