diff --git a/testnet-contracts/package.json b/testnet-contracts/package.json
index b663ed4..68e564d 100644
--- a/testnet-contracts/package.json
+++ b/testnet-contracts/package.json
@@ -17,7 +17,7 @@
     "eth-lib": "^0.2.8",
     "ethereumjs-util": "^5.2.0",
     "keccak": "^1.4.0",
-    "lodash": "^4.17.13",
+    "lodash": "^4.17.19",
     "truffle-contract": "^4.0.31",
     "truffle-hdwallet-provider": "^1.0.17",
     "utf8": "^3.0.0"
diff --git a/yarn.lock b/yarn.lock
index b62fe82..0b6b644 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2706,10 +2706,10 @@ levelup@^1.2.1:
     semver "~5.4.1"
     xtend "~4.0.0"
 
-lodash@^4.17.10, lodash@^4.17.13, lodash@^4.17.14, lodash@^4.17.4:
-  version "4.17.15"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.15.tgz#b447f6670a0455bbfeedd11392eff330ea097548"
-  integrity sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A==
+lodash@^4.17.13, lodash@^4.17.14, lodash@^4.17.19, lodash@^4.17.4:
+  version "4.17.19"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.19.tgz#e48ddedbe30b3321783c5b4301fbd353bc1e4a4b"
+  integrity sha512-JNvd8XER9GQX0v2qJgsaN/mzFCNA5BRe/j8JN9d+tWyGLSodKQHKFicdwNYzWwI3wjRnaKPsGj1XkBjx/F96DQ==
 
 loose-envify@^1.0.0:
   version "1.4.0"