diff --git a/package-lock.json b/package-lock.json
index 3073584..beee73f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -125,12 +125,20 @@
       "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==",
       "dev": true,
       "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==",
+          "dev": true
+        }
       }
     },
     "asynckit": {
@@ -1616,6 +1624,21 @@
       "requires": {
         "bitcoincash-ops": "github:Bitcoin-com/bitcoincash-ops#2.0.0",
         "pushdata-bitcoin": "github:Bitcoin-com/pushdata-bitcoin#1.2.1"
+      },
+      "dependencies": {
+        "bitcoincash-ops": {
+          "version": "github:Bitcoin-com/bitcoincash-ops#6ab82cc7326c67236f3b2d9d0457258ac2ef48e3",
+          "from": "github:Bitcoin-com/bitcoincash-ops#2.0.0",
+          "dev": true
+        },
+        "pushdata-bitcoin": {
+          "version": "github:Bitcoin-com/pushdata-bitcoin#9b75eebe597853c6eeaec3e6c44b6d9c9cd7ee86",
+          "from": "github:Bitcoin-com/pushdata-bitcoin#1.2.1",
+          "dev": true,
+          "requires": {
+            "bitcoincash-ops": "github:Bitcoin-com/bitcoincash-ops#2.0.0"
+          }
+        }
       }
     },
     "minimatch": {
@@ -3336,6 +3359,12 @@
       "from": "github:Bitcoin-com/pushdata-bitcoin#1.2.1",
       "requires": {
         "bitcoincash-ops": "github:Bitcoin-com/bitcoincash-ops#2.0.0"
+      },
+      "dependencies": {
+        "bitcoincash-ops": {
+          "version": "github:Bitcoin-com/bitcoincash-ops#6ab82cc7326c67236f3b2d9d0457258ac2ef48e3",
+          "from": "github:Bitcoin-com/bitcoincash-ops#2.0.0"
+        }
       }
     },
     "qs": {
diff --git a/package.json b/package.json
index 276856a..e7d15ea 100644
--- a/package.json
+++ b/package.json
@@ -47,7 +47,7 @@
     "wif": "^2.0.1"
   },
   "devDependencies": {
-    "async": "^2.0.1",
+    "async": "^2.6.4",
     "bip39": "^2.3.0",
     "bs58": "^4.0.0",
     "cb-http-client": "^0.2.0",