diff --git a/package.json b/package.json
index bf5d26e..f252df5 100644
--- a/package.json
+++ b/package.json
@@ -64,7 +64,7 @@
     "joi": "^14.3.1",
     "jsonschema": "^1.2.4",
     "juice": "^5.2.0",
-    "lodash": "^4.17.11",
+    "lodash": "^4.17.21",
     "mailchimp-api-v3": "^1.13.0",
     "mustache": "^3.0.1",
     "node-fetch": "^2.3.0",
diff --git a/yarn.lock b/yarn.lock
index 647d049..7a6283b 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4742,11 +4742,16 @@ lodash.unescape@^4.0.1:
   resolved "https://registry.yarnpkg.com/lodash.unescape/-/lodash.unescape-4.0.1.tgz#bf2249886ce514cda112fae9218cdc065211fc9c"
   integrity sha1-vyJJiGzlFM2hEvrpIYzcBlIR/Jw=
 
-lodash@4.17.11, lodash@^4.17.11, lodash@^4.17.4, lodash@^4.17.5:
+lodash@4.17.11:
   version "4.17.11"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.11.tgz#b39ea6229ef607ecd89e2c8df12536891cac9b8d"
   integrity sha512-cQKh8igo5QUhZ7lg38DYWAxMvjSAKG0A8wGSVimP07SIUEK2UO+arSRKbRZWtelMtN5V0Hkwh5ryOto/SshYIg==
 
+lodash@^4.17.11, lodash@^4.17.21, lodash@^4.17.4, lodash@^4.17.5:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
+  integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
+
 long@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/long/-/long-4.0.0.tgz#9a7b71cfb7d361a194ea555241c92f7468d5bf28"