diff --git a/travis/scripts/stress/package.json b/travis/scripts/stress/package.json
index d326da9..59d81fe 100644
--- a/travis/scripts/stress/package.json
+++ b/travis/scripts/stress/package.json
@@ -5,7 +5,7 @@
   },
   "license": "ISC",
   "dependencies": {
-    "async": "^2.6.1",
+    "async": "^2.6.4",
     "csv-parse": "^3.0.0",
     "ethereumjs-tx": "^1.3.7",
     "winston": "^3.1.0"
diff --git a/travis/scripts/stress/yarn.lock b/travis/scripts/stress/yarn.lock
index 01333e9..46038cc 100644
--- a/travis/scripts/stress/yarn.lock
+++ b/travis/scripts/stress/yarn.lock
@@ -2,11 +2,11 @@
 # yarn lockfile v1
 
 
-async@^2.6.0, async@^2.6.1:
-  version "2.6.1"
-  resolved "https://registry.yarnpkg.com/async/-/async-2.6.1.tgz#b245a23ca71930044ec53fa46aa00a3e87c6a610"
+async@^2.6.0, async@^2.6.4:
+  version "2.6.4"
+  resolved "https://registry.yarnpkg.com/async/-/async-2.6.4.tgz#706b7ff6084664cd7eae713f6f965433b5504221"
   dependencies:
-    lodash "^4.17.10"
+    lodash "^4.17.14"
 
 bindings@^1.2.1:
   version "1.3.0"
@@ -256,9 +256,9 @@ kuler@1.0.x:
   dependencies:
     colornames "^1.1.1"
 
-lodash@^4.17.10:
-  version "4.17.10"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.10.tgz#1b7793cf7259ea38fb3661d4d38b3260af8ae4e7"
+lodash@^4.17.14:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
 
 logform@^1.9.1:
   version "1.9.1"