diff --git a/package-lock.json b/package-lock.json
index 6da2493..af0fc2f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -175,9 +175,19 @@
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     },
     "async": {
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-      "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"
+      },
+      "dependencies": {
+        "lodash": {
+          "version": "4.17.21",
+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
+          "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg=="
+        }
+      }
     },
     "async-done": {
       "version": "1.2.4",
@@ -4429,11 +4439,6 @@
       "resolved": "https://registry.npmjs.org/mute-stdout/-/mute-stdout-1.0.0.tgz",
       "integrity": "sha1-WzLqB+tDyd7WEwQ0z5JvRrKn/U0="
     },
-    "nan": {
-      "version": "2.10.0",
-      "resolved": "https://registry.npmjs.org/nan/-/nan-2.10.0.tgz",
-      "integrity": "sha512-bAdJv7fBLhWC+/Bls0Oza+mvTaNQtP+1RyhhhvD95pgUJz6XM5IzgmxOkItJ9tkoCiplvAnXI1tNmmUD/eScyA=="
-    },
     "nanomatch": {
       "version": "1.2.9",
       "resolved": "https://registry.npmjs.org/nanomatch/-/nanomatch-1.2.9.tgz",
@@ -4500,14 +4505,6 @@
       "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-2.6.0.tgz",
       "integrity": "sha512-8dG4H5ujfvFiqDmVu9fQ5bOHUC15JMjMY/Zumv26oOvvVJjM67KF8koCWIabKQ1GJIa9r2mMZscBq/TbdOcmNA=="
     },
-    "node-pty": {
-      "version": "0.7.8",
-      "resolved": "https://registry.npmjs.org/node-pty/-/node-pty-0.7.8.tgz",
-      "integrity": "sha512-2c2tZtGnvIJUWw8fDipxO953Mytqc5/IdRZK+YF52NtFMNTuWCQ41QDLEx76W64MEZkfDMoZyah6KPmyW1LO7g==",
-      "requires": {
-        "nan": "2.10.0"
-      }
-    },
     "normalize-package-data": {
       "version": "2.3.5",
       "resolved": "https://registry.npmjs.org/normalize-package-data/-/normalize-package-data-2.3.5.tgz",
diff --git a/package.json b/package.json
index b46d31e..ba274e3 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
   "homepage": "https://github.com/LivelyKernel/lively4-server",
   "dependencies": {
     "argv": "0.0.2",
-    "async": "^1.5.2",
+    "async": "^2.6.4",
     "babel-plugin-syntax-async-functions": "^6.13.0",
     "babel-plugin-syntax-async-generators": "^6.13.0",
     "babel-plugin-transform-regenerator": "^6.26.0",