diff --git a/package-lock.json b/package-lock.json
index f91839e..ae8a7d1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,6 +4,52 @@
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+      "resolved": "https://registry.npmjs.org/@openzeppelin/resolver-engine-fs/-/resolver-engine-fs-0.3.3.tgz",
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+      "dev": true,
+      "requires": {
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+      "resolved": "https://registry.npmjs.org/@openzeppelin/resolver-engine-imports-fs/-/resolver-engine-imports-fs-0.3.3.tgz",
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+      "dev": true,
+      "requires": {
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+        "@openzeppelin/resolver-engine-imports": "^0.3.3",
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@@ -46,6 +92,36 @@
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+      "resolved": "https://registry.npmjs.org/@sindresorhus/is/-/is-0.14.0.tgz",
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+      "resolved": "https://registry.npmjs.org/@solidity-parser/parser/-/parser-0.14.5.tgz",
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+      "dev": true,
+      "requires": {
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+      "resolved": "https://registry.npmjs.org/@truffle/error/-/error-0.0.6.tgz",
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@@ -55,6 +131,30 @@
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+      "resolved": "https://registry.npmjs.org/@types/fs-extra/-/fs-extra-7.0.0.tgz",
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+      "dev": true,
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@@ -62,9 +162,27 @@
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+      "dev": true,
+      "requires": {
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+      "resolved": "https://registry.npmjs.org/@types/pbkdf2/-/pbkdf2-3.1.0.tgz",
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+      "dev": true,
+      "requires": {
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+      "resolved": "https://registry.npmjs.org/@types/secp256k1/-/secp256k1-4.0.3.tgz",
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@@ -92,15 +210,6 @@
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@@ -129,10 +238,16 @@
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-      "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
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@@ -144,6 +259,12 @@
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@@ -182,24 +303,6 @@
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+            "p-limit": {
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+        "zos-lib": {
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+          "dev": true,
+          "requires": {
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+            "@types/web3": "^1.0.14",
+            "axios": "^0.18.0",
+            "bignumber.js": "^7.2.0",
+            "cbor": "^4.1.5",
+            "chalk": "^2.4.1",
+            "ethers": "^4.0.20",
+            "glob": "^7.1.3",
+            "lodash.concat": "^4.5.0",
+            "lodash.difference": "^4.5.0",
+            "lodash.every": "^4.6.0",
+            "lodash.findlast": "^4.6.0",
+            "lodash.flatten": "^4.4.0",
+            "lodash.includes": "^4.3.0",
+            "lodash.invertby": "^4.7.0",
+            "lodash.isarray": "^4.0.0",
+            "lodash.isempty": "^4.4.0",
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+            "web3": "1.0.0-beta.37",
+            "web3-utils": "1.0.0-beta.37"
+          },
+          "dependencies": {
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+            },
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         }
       }
     },
diff --git a/package.json b/package.json
index ef10edb..183bc9a 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,7 @@
   "author": "Alessio Delmonti",
   "license": "MIT",
   "devDependencies": {
-    "zos": "^2.2.1",
+    "zos": "^2.4.3",
     "zos-lib": "^2.2.1"
   },
   "dependencies": {