diff --git a/learn_webpack/package-lock.json b/learn_webpack/package-lock.json
index d967b99..d1ffc49 100644
--- a/learn_webpack/package-lock.json
+++ b/learn_webpack/package-lock.json
@@ -3444,9 +3444,9 @@
       }
     },
     "lodash": {
-      "version": "4.17.15",
-      "resolved": "https://registry.npm.taobao.org/lodash/download/lodash-4.17.15.tgz?cache=0&sync_timestamp=1563508077056&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Flodash%2Fdownload%2Flodash-4.17.15.tgz",
-      "integrity": "sha1-tEf2ZwoEVbv+7dETku/zMOoJdUg="
+      "version": "4.17.21",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
+      "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg=="
     },
     "loglevel": {
       "version": "1.6.3",
diff --git a/learn_webpack/package.json b/learn_webpack/package.json
index bc09a47..12b141c 100644
--- a/learn_webpack/package.json
+++ b/learn_webpack/package.json
@@ -26,6 +26,6 @@
     "webpack-dev-server": "^3.7.2"
   },
   "dependencies": {
-    "lodash": "^4.17.15"
+    "lodash": "^4.17.21"
   }
 }