diff --git a/byzantine/tests/package.json b/byzantine/tests/package.json
index 019e30a15..875820351 100644
--- a/byzantine/tests/package.json
+++ b/byzantine/tests/package.json
@@ -15,7 +15,7 @@
     "graphql": "^15.2.0",
     "graphql-tag": "^2.10.1",
     "toml": "^3.0.0",
-    "lodash": "^4.17.15",
+    "lodash": "^4.17.21",
     "ts-node": "^8.3.0",
     "typescript": "^3.5.3"
   },
diff --git a/byzantine/tests/yarn.lock b/byzantine/tests/yarn.lock
index 4e3209951..19ef363fc 100644
--- a/byzantine/tests/yarn.lock
+++ b/byzantine/tests/yarn.lock
@@ -2609,10 +2609,10 @@ lodash.sortby@^4.7.0:
   resolved "https://registry.yarnpkg.com/lodash.sortby/-/lodash.sortby-4.7.0.tgz#edd14c824e2cc9c1e0b0a1b42bb5210516a42438"
   integrity sha1-7dFMgk4sycHgsKG0K7UhBRakJDg=
 
-lodash@^4.17.15, lodash@^4.17.19:
-  version "4.17.20"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.20.tgz#b44a9b6297bcb698f1c51a3545a2b3b368d59c52"
-  integrity sha512-PlhdFcillOINfeV7Ni6oF1TAEayyZBoZ8bcshTHqOYJYlrqzRK5hagpagky5o4HfCzzd1TRkXPMFq6cKk9rGmA==
+lodash@^4.17.15, lodash@^4.17.19, lodash@^4.17.21:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
+  integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
 
 loose-envify@^1.0.0:
   version "1.4.0"