diff --git a/artillery-engine-cothority/package-lock.json b/artillery-engine-cothority/package-lock.json
index 398f7a4..838bacb 100644
--- a/artillery-engine-cothority/package-lock.json
+++ b/artillery-engine-cothority/package-lock.json
@@ -182,19 +182,9 @@
       "dev": true
     },
     "async": {
-      "version": "2.6.0",
-      "resolved": "https://registry.npmjs.org/async/-/async-2.6.0.tgz",
-      "integrity": "sha512-xAfGg1/NTLBBKlHFmnd7PlmUW9KhVQIUuSrYem9xzFUZy13ScvtyGGejaae9iAVRiRq9+Cx7DPFaAAhCpyxyPw==",
-      "requires": {
-        "lodash": "^4.14.0"
-      },
-      "dependencies": {
-        "lodash": {
-          "version": "4.17.15",
-          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.15.tgz",
-          "integrity": "sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A=="
-        }
-      }
+      "version": "3.2.2",
+      "resolved": "https://registry.npmjs.org/async/-/async-3.2.2.tgz",
+      "integrity": "sha512-H0E+qZaDEfx/FY4t7iLRv1W2fFI6+pyCeTw1uN20AQPiwqwM6ojPxHxdLv4z8hi2DtnW9BOckSspLucW7pIE5g=="
     },
     "async-limiter": {
       "version": "1.0.0",
diff --git a/artillery-engine-cothority/package.json b/artillery-engine-cothority/package.json
index a51ad4e..b4102ab 100644
--- a/artillery-engine-cothority/package.json
+++ b/artillery-engine-cothority/package.json
@@ -20,7 +20,7 @@
   },
   "dependencies": {
     "@dedis/cothority": "^1.1.0",
-    "async": "^2.6.0",
+    "async": "^3.2.2",
     "debug": "^3.1.0",
     "esprima": "^4.0.0",
     "lodash": "^4.17.15",