diff --git a/functions/package-lock.json b/functions/package-lock.json
index c4a0422..bd1e5cf 100644
--- a/functions/package-lock.json
+++ b/functions/package-lock.json
@@ -1366,9 +1366,9 @@
       }
     },
     "lodash": {
-      "version": "4.17.11",
-      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.11.tgz",
-      "integrity": "sha512-cQKh8igo5QUhZ7lg38DYWAxMvjSAKG0A8wGSVimP07SIUEK2UO+arSRKbRZWtelMtN5V0Hkwh5ryOto/SshYIg=="
+      "version": "4.17.21",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
+      "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg=="
     },
     "lodash.at": {
       "version": "4.6.0",
diff --git a/functions/package.json b/functions/package.json
index 220f99a..54af0bc 100644
--- a/functions/package.json
+++ b/functions/package.json
@@ -14,7 +14,7 @@
   "dependencies": {
     "firebase-admin": "^8.0.0",
     "firebase-functions": "^3.0.0",
-    "lodash": "^4.17.11"
+    "lodash": "^4.17.21"
   },
   "devDependencies": {
     "firebase-functions-test": "^0.1.6"