diff --git a/package.json b/package.json
index 113673b..993fd3f 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
     "hexo-renderer-marked": "^0.2.5",
     "hexo-renderer-stylus": "^0.3.0",
     "hexo-server": "^0.1.2",
-    "lodash": "^3.10.1",
+    "lodash": "^4.17.21",
     "lunr": "^0.6.0"
   },
   "devDependencies": {
diff --git a/yarn.lock b/yarn.lock
index cd275fc..cd0cebc 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3754,9 +3754,9 @@ lodash@^3.10.1, lodash@^3.2.0:
   version "3.10.1"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-3.10.1.tgz#5bf45e8e49ba4189e17d482789dfd15bd140b7b6"
 
-lodash@^4.0.0, lodash@^4.1.0, lodash@^4.13.1, lodash@^4.2.1:
-  version "4.17.4"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.4.tgz#78203a4d1c328ae1d86dca6460e369b57f4055ae"
+lodash@^4.0.0, lodash@^4.1.0, lodash@^4.13.1, lodash@^4.17.21, lodash@^4.2.1:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
 
 lodash@~1.0.1:
   version "1.0.2"