diff --git a/package.json b/package.json
index 8f5f598..430707f 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
     "html-webpack-plugin": "2.29.0",
     "jest": "20.0.4",
     "katex": "^0.10.0-beta",
-    "lodash": "^4.17.13",
+    "lodash": "^4.17.21",
     "markdown-it": "^8.4.0",
     "markdown-it-task-lists": "^2.1.0",
     "node-sass": "^4.6.0",
diff --git a/yarn.lock b/yarn.lock
index 44a8842..2e4b16d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4866,10 +4866,10 @@ lodash.uniq@^4.5.0:
   resolved "https://registry.yarnpkg.com/lodash.uniq/-/lodash.uniq-4.5.0.tgz#d0225373aeb652adc1bc82e4945339a842754773"
   integrity sha1-0CJTc662Uq3BvILklFM5qEJ1R3M=
 
-"lodash@>=3.5 <5", lodash@^4.0.0, lodash@^4.16.5, lodash@^4.17.11, lodash@^4.17.13, lodash@^4.17.3, lodash@^4.17.4, lodash@^4.17.5, lodash@^4.2.1, lodash@^4.3.0, lodash@~4.17.10:
-  version "4.17.13"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.13.tgz#0bdc3a6adc873d2f4e0c4bac285df91b64fc7b93"
-  integrity sha512-vm3/XWXfWtRua0FkUyEHBZy8kCPjErNBT9fJx8Zvs+U6zjqPbTUOpkaoum3O5uiA8sm+yNMHXfYkTUHFoMxFNA==
+"lodash@>=3.5 <5", lodash@^4.0.0, lodash@^4.16.5, lodash@^4.17.11, lodash@^4.17.21, lodash@^4.17.3, lodash@^4.17.4, lodash@^4.17.5, lodash@^4.2.1, lodash@^4.3.0, lodash@~4.17.10:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
+  integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
 
 loglevel@^1.4.1:
   version "1.6.3"