diff --git a/package-lock.json b/package-lock.json
index 1ca4441..5053031 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -600,11 +600,18 @@
       "dev": true
     },
     "async": {
-      "version": "2.6.1",
-      "resolved": "https://registry.npmjs.org/async/-/async-2.6.1.tgz",
-      "integrity": "sha512-fNEiL2+AZt6AlAw/29Cr0UDe4sRAHCpEHh54WMz+Bb7QfNcFw4h3loofyJpLeQs4Yx7yuqu/2dLgM5hKOs6HlQ==",
+      "version": "2.6.4",
+      "resolved": "https://registry.npmjs.org/async/-/async-2.6.4.tgz",
+      "integrity": "sha512-mzo5dfJYwAn29PeiJ0zvwTo04zj8HDJj0Mn8TD7sno7q12prdbnasKJHhkm2c1LgrhlJ0teaea8860oxi51mGA==",
       "requires": {
-        "lodash": "^4.17.10"
+        "lodash": "^4.17.14"
+      },
+      "dependencies": {
+        "lodash": {
+          "version": "4.17.21",
+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
+          "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg=="
+        }
       }
     },
     "async-each": {
diff --git a/package.json b/package.json
index 63683c0..4ed4ef4 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
   "author": "Alastria",
   "license": "MIT",
   "dependencies": {
-    "async": "^2.1.4",
+    "async": "^2.6.4",
     "easyweb3": "^1.1.4",
     "ethjs-abi": "^0.1.8",
     "ethjs-util": "^0.1.3",