diff --git a/.npmrc b/.npmrc
new file mode 100644
index 000000000..b6f27f135
--- /dev/null
+++ b/.npmrc
@@ -0,0 +1 @@
+engine-strict=true
diff --git a/package-lock.json b/package-lock.json
index de8fcd667..b04462f64 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5,9 +5,9 @@
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+      "resolved": "https://registry.npmjs.org/@oclif/command/-/command-1.5.19.tgz",
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+          "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.1.tgz",
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+      "resolved": "https://registry.npmjs.org/@oclif/config/-/config-1.14.0.tgz",
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@@ -137,41 +122,16 @@
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+      "version": "2.2.3",
+      "resolved": "https://registry.npmjs.org/@oclif/plugin-help/-/plugin-help-2.2.3.tgz",
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-        "indent-string": "^3.2.0",
+        "indent-string": "^4.0.0",
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@@ -179,17 +139,19 @@
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+        "indent-string": {
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+        "string-width": {
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+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-3.1.0.tgz",
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@@ -207,10 +169,15 @@
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+      "resolved": "https://registry.npmjs.org/@truffle/error/-/error-0.0.6.tgz",
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+      "resolved": "https://registry.npmjs.org/@types/bn.js/-/bn.js-4.11.6.tgz",
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-        "through": ">=2.2.7 <3"
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-      "integrity": "sha1-63d99gEXI6OxTopywIBcjoZ0a9I=",
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-      "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8="
+      "version": "4.1.0",
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@@ -504,6 +433,10 @@
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+      "version": "git+https://github.com/frozeman/bignumber.js-nolookahead.git#57692b3ecfc98bbdd6b3a516cb2353652ea49934",
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@@ -9058,9 +7909,9 @@
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+        "os-locale": "^1.4.0",
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-        "which-module": "^2.0.0",
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-        "yargs-parser": "^13.1.1"
+        "string-width": "^1.0.1",
+        "which-module": "^1.0.0",
+        "window-size": "^0.2.0",
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diff --git a/package.json b/package.json
index 721a1ecf5..01d793750 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
     "url": "https://github.com/bancorprotocol/contracts"
   },
   "engines": {
-    "npm": "^3.0.0"
+    "node": "<12.0.0"
   },
   "scripts": {
     "install": "node scripts/fix-modules.js",