diff --git a/package.json b/package.json
old mode 100755
new mode 100644
index 8a63e795..e13eef4b
--- a/package.json
+++ b/package.json
@@ -80,7 +80,7 @@
     "grunt-wp-i18n": "^1.0.0",
     "html-webpack-plugin": "^2.30.1",
     "load-grunt-tasks": "^0.6.0",
-    "lodash": "~2.4.1",
+    "lodash": "~4.17.21",
     "node-notifier": "^5.1.2",
     "node-sass": "^4.7.2",
     "optimize-css-assets-webpack-plugin": "^3.2.0",
diff --git a/yarn.lock b/yarn.lock
index 5a3a8009..c13747a4 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5519,15 +5519,10 @@ lodash@^3.10.1, lodash@^3.3.1, lodash@^3.7.0:
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-3.10.1.tgz#5bf45e8e49ba4189e17d482789dfd15bd140b7b6"
   integrity sha1-W/Rejkm6QYnhfUgnid/RW9FAt7Y=
 
-lodash@^4.0.0, lodash@^4.17.11, lodash@^4.17.14, lodash@^4.17.15, lodash@^4.17.3, lodash@^4.17.4, lodash@^4.3.0, lodash@~4.17.10:
-  version "4.17.15"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.15.tgz#b447f6670a0455bbfeedd11392eff330ea097548"
-  integrity sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A==
-
-lodash@^4.14.2, 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@^4.0.0, lodash@^4.14.2, lodash@^4.17.11, lodash@^4.17.14, lodash@^4.17.15, lodash@^4.17.3, lodash@^4.17.4, lodash@^4.3.0, lodash@~4.17.10, lodash@~4.17.19, lodash@~4.17.20, 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@~0.9.2:
   version "0.9.2"