diff --git a/package.json b/package.json
index 7e4025d..a05f103 100644
--- a/package.json
+++ b/package.json
@@ -89,7 +89,7 @@
     "frontail": "^4.6.0",
     "fs-jetpack": "^2.2.2",
     "jest": "^26.6.3",
-    "lodash": "^4.17.20",
+    "lodash": "^4.17.21",
     "prettier": "1.18.2",
     "react": "^16.13.1",
     "react-d3-tree": "^2.0.1",
diff --git a/yarn.lock b/yarn.lock
index d0abb65..9851431 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6035,10 +6035,10 @@ lodash.uniq@^4.5.0:
   resolved "https://registry.yarnpkg.com/lodash.uniq/-/lodash.uniq-4.5.0.tgz#d0225373aeb652adc1bc82e4945339a842754773"
   integrity sha1-0CJTc662Uq3BvILklFM5qEJ1R3M=
 
-lodash@^4.17.10, lodash@^4.17.19, lodash@^4.17.20:
-  version "4.17.20"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.20.tgz#b44a9b6297bcb698f1c51a3545a2b3b368d59c52"
-  integrity sha512-PlhdFcillOINfeV7Ni6oF1TAEayyZBoZ8bcshTHqOYJYlrqzRK5hagpagky5o4HfCzzd1TRkXPMFq6cKk9rGmA==
+lodash@^4.17.10, lodash@^4.17.19, lodash@^4.17.21:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
+  integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
 
 loose-envify@^1.0.0, loose-envify@^1.1.0, loose-envify@^1.2.0, loose-envify@^1.3.1, loose-envify@^1.4.0:
   version "1.4.0"