diff --git a/package-lock.json b/package-lock.json
index eaaaa92..382088f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -20,6 +20,13 @@
         "sha3": "^1.1.0",
         "underscore": "^1.8.3",
         "vaporyjs-util": "5.1.5"
+      },
+      "dependencies": {
+        "async": {
+          "version": "1.5.2",
+          "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz",
+          "integrity": "sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo="
+        }
       }
     },
     "@vaporyjs/devp2p-dpt": {
@@ -78,6 +85,11 @@
         "vaporyjs-util": "^5.1.5"
       },
       "dependencies": {
+        "async": {
+          "version": "1.5.2",
+          "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz",
+          "integrity": "sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo="
+        },
         "isarray": {
           "version": "1.0.0",
           "resolved": "https://registry.npmjs.org/isarray/-/isarray-1.0.0.tgz",
@@ -173,9 +185,12 @@
       "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU="
     },
     "async": {
-      "version": "1.5.2",
-      "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz",
-      "integrity": "sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo="
+      "version": "2.6.4",
+      "resolved": "https://registry.npmjs.org/async/-/async-2.6.4.tgz",
+      "integrity": "sha512-mzo5dfJYwAn29PeiJ0zvwTo04zj8HDJj0Mn8TD7sno7q12prdbnasKJHhkm2c1LgrhlJ0teaea8860oxi51mGA==",
+      "requires": {
+        "lodash": "^4.17.14"
+      }
     },
     "async-eventemitter": {
       "version": "0.2.2",
@@ -386,6 +401,13 @@
         "vaporyjs-block": "^1.7.1",
         "vaporyjs-tx": "^1.3.3",
         "vaporyjs-util": "^5.1.5"
+      },
+      "dependencies": {
+        "async": {
+          "version": "1.5.2",
+          "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz",
+          "integrity": "sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo="
+        }
       }
     },
     "drbg.js": {
diff --git a/package.json b/package.json
index 4791ccc..688711f 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
   },
   "homepage": "https://github.com/vaporyjs/node-blockchain-server",
   "dependencies": {
-    "async": "^1.4.2",
+    "async": "^2.6.4",
     "@vaporyjs/devp2p": "^0.0.5",
     "devp2p-vap": "0.0.1",
     "vapory-common": "^0.2.2",