diff --git a/package.json b/package.json
index 1d56e81..570c29d 100644
--- a/package.json
+++ b/package.json
@@ -46,7 +46,7 @@
     "koa": "2.7.0",
     "koa-router": "7.4.0",
     "koa-send": "5.0.0",
-    "lodash": "4.17.11",
+    "lodash": "4.17.21",
     "microseconds": "0.1.0",
     "mobx": "5.9.0",
     "mobx-react": "5.4.3",
diff --git a/yarn.lock b/yarn.lock
index 33d8cb8..70f56ad 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6338,7 +6338,12 @@ lodash.uniq@^4.5.0:
   resolved "https://registry.yarnpkg.com/lodash.uniq/-/lodash.uniq-4.5.0.tgz#d0225373aeb652adc1bc82e4945339a842754773"
   integrity sha1-0CJTc662Uq3BvILklFM5qEJ1R3M=
 
-lodash@4.17.11, lodash@^4.0.0, lodash@^4.17.10, lodash@^4.17.11, lodash@^4.17.3, lodash@^4.17.4, lodash@^4.17.5, lodash@~4.17.10:
+lodash@4.17.21:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
+  integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
+
+lodash@^4.0.0, lodash@^4.17.10, lodash@^4.17.11, lodash@^4.17.3, lodash@^4.17.4, lodash@^4.17.5, lodash@~4.17.10:
   version "4.17.11"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.11.tgz#b39ea6229ef607ecd89e2c8df12536891cac9b8d"
   integrity sha512-cQKh8igo5QUhZ7lg38DYWAxMvjSAKG0A8wGSVimP07SIUEK2UO+arSRKbRZWtelMtN5V0Hkwh5ryOto/SshYIg==