diff --git a/package.json b/package.json
index 875b4fcf..2a033227 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
     "babel-polyfill": "^6.26.0",
     "codemirror": "^5.33.0",
     "cross-env": "^5.1.4",
-    "lodash": "^4.17.13",
+    "lodash": "^4.17.21",
     "node-pty": "^0.7.4",
     "parcel-bundler": "^1.6.2",
     "react": "^16.2.0",
diff --git a/yarn.lock b/yarn.lock
index 18f39df2..3655df62 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4049,9 +4049,9 @@ lodash.uniq@^4.5.0:
   version "4.5.0"
   resolved "https://registry.yarnpkg.com/lodash.uniq/-/lodash.uniq-4.5.0.tgz#d0225373aeb652adc1bc82e4945339a842754773"
 
-lodash@^4.13.1, lodash@^4.16.5, lodash@^4.17.10, lodash@^4.17.13, lodash@^4.17.4, lodash@^4.17.5, lodash@^4.5.1:
-  version "4.17.13"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.13.tgz#0bdc3a6adc873d2f4e0c4bac285df91b64fc7b93"
+lodash@^4.13.1, lodash@^4.16.5, lodash@^4.17.10, lodash@^4.17.21, lodash@^4.17.4, lodash@^4.17.5, lodash@^4.5.1:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
 
 loose-envify@^1.0.0, loose-envify@^1.1.0, loose-envify@^1.3.1:
   version "1.3.1"