diff --git a/package-lock.json b/package-lock.json
index ffa8418..c8f0462 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1154,9 +1154,9 @@
       }
     },
     "lodash": {
-      "version": "4.17.13",
-      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.13.tgz",
-      "integrity": "sha512-vm3/XWXfWtRua0FkUyEHBZy8kCPjErNBT9fJx8Zvs+U6zjqPbTUOpkaoum3O5uiA8sm+yNMHXfYkTUHFoMxFNA=="
+      "version": "4.17.21",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
+      "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg=="
     },
     "memorystream": {
       "version": "0.3.1",
diff --git a/package.json b/package.json
index 8abad3f..d075a47 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "dependencies": {
     "cheerio": "1.0.0-rc.2",
     "gitbook-plugin-search": "2.2.1",
-    "lodash": "4.17.13",
+    "lodash": "4.17.21",
     "q": "1.5.1",
     "q-plus": "0.0.8"
   },