diff --git a/package.json b/package.json
index fa512c20b4e5..f2c600fe2ebf 100644
--- a/package.json
+++ b/package.json
@@ -76,7 +76,7 @@
     "karma-script-launcher": "1.0.0",
     "karma-spec-reporter": "0.0.32",
     "load-grunt-tasks": "^3.5.0",
-    "lodash": "~4.17.19",
+    "lodash": "~4.17.21",
     "log4js": "^0.6.27",
     "lunr": "^0.7.2",
     "marked": "~0.3.0",
diff --git a/yarn.lock b/yarn.lock
index 86b8ecfa1f87..182d32ecffdb 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6693,15 +6693,10 @@ lodash@^3.10.1, lodash@~3.10.1:
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-3.10.1.tgz#5bf45e8e49ba4189e17d482789dfd15bd140b7b6"
   integrity sha1-W/Rejkm6QYnhfUgnid/RW9FAt7Y=
 
-lodash@^4.0.0, lodash@^4.13.1, lodash@^4.16.6, lodash@^4.17.10, lodash@^4.17.11, lodash@^4.17.14, lodash@^4.17.5, lodash@^4.3.0, lodash@^4.6.1, lodash@^4.7.0, lodash@^4.8.0, lodash@~4.17.19:
-  version "4.17.19"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.19.tgz#e48ddedbe30b3321783c5b4301fbd353bc1e4a4b"
-  integrity sha512-JNvd8XER9GQX0v2qJgsaN/mzFCNA5BRe/j8JN9d+tWyGLSodKQHKFicdwNYzWwI3wjRnaKPsGj1XkBjx/F96DQ==
-
-lodash@^4.17.19:
-  version "4.17.20"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.20.tgz#b44a9b6297bcb698f1c51a3545a2b3b368d59c52"
-  integrity sha512-PlhdFcillOINfeV7Ni6oF1TAEayyZBoZ8bcshTHqOYJYlrqzRK5hagpagky5o4HfCzzd1TRkXPMFq6cKk9rGmA==
+lodash@^4.0.0, lodash@^4.13.1, lodash@^4.16.6, lodash@^4.17.10, lodash@^4.17.11, lodash@^4.17.14, lodash@^4.17.19, lodash@^4.17.5, lodash@^4.3.0, lodash@^4.6.1, lodash@^4.7.0, lodash@^4.8.0, 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@~1.0.1:
   version "1.0.2"