diff --git a/lib/fixer.js b/lib/fixer.js
index 0a3b2d4..27682e9 100644
--- a/lib/fixer.js
+++ b/lib/fixer.js
@@ -1,7 +1,7 @@
 var semver = require("semver")
 var validateLicense = require('validate-npm-package-license');
 var hostedGitInfo = require("hosted-git-info")
-var isBuiltinModule = require("is-builtin-module")
+var isBuiltinModule = require("resolve").isCore
 var depTypes = ["dependencies","devDependencies","optionalDependencies"]
 var extractDescription = require("./extract_description")
 var url = require("url")
diff --git a/package-lock.json b/package-lock.json
index 8936980..237ef5a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -128,11 +128,6 @@
       "integrity": "sha512-MQcXEUbCKtEo7bhqEs6560Hyd4XaovZlO/k9V3hjVUF/zwW7KBVdSK4gIt/bzwS9MbR5qob+F5jusZsb0YQK2A==",
       "dev": true
     },
-    "builtin-modules": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/builtin-modules/-/builtin-modules-1.1.1.tgz",
-      "integrity": "sha1-Jw8HbFpywC9bZaR9+Uxf46J4iS8="
-    },
     "capture-stack-trace": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/capture-stack-trace/-/capture-stack-trace-1.0.1.tgz",
@@ -424,14 +419,6 @@
       "integrity": "sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4=",
       "dev": true
     },
-    "is-builtin-module": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/is-builtin-module/-/is-builtin-module-1.0.0.tgz",
-      "integrity": "sha1-VAVy0096wxGfj3bDDLwbHgN6/74=",
-      "requires": {
-        "builtin-modules": "^1.0.0"
-      }
-    },
     "is-typedarray": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/is-typedarray/-/is-typedarray-1.0.0.tgz",
@@ -647,7 +634,6 @@
           "version": "0.1.4",
           "bundled": true,
           "dev": true,
-          "optional": true,
           "requires": {
             "kind-of": "^3.0.2",
             "longest": "^1.0.1",
@@ -1830,8 +1816,7 @@
         "longest": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true,
-          "optional": true
+          "dev": true
         },
         "loose-envify": {
           "version": "1.3.1",
@@ -3288,6 +3273,11 @@
       "integrity": "sha1-F0uSaHNVNP+8es5r9TpanhtcX18=",
       "dev": true
     },
+    "path-parse": {
+      "version": "1.0.6",
+      "resolved": "https://registry.npmjs.org/path-parse/-/path-parse-1.0.6.tgz",
+      "integrity": "sha512-GSmOT2EbHrINBf9SR7CDELwlJ8AENk3Qn7OikK4nFYAu3Ote2+JYNVvkpAEQm3/TLNEJFD/xZJjzyxg3KBWOzw=="
+    },
     "performance-now": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/performance-now/-/performance-now-2.1.0.tgz",
@@ -3369,6 +3359,14 @@
         "uuid": "^3.3.2"
       }
     },
+    "resolve": {
+      "version": "1.10.0",
+      "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.10.0.tgz",
+      "integrity": "sha512-3sUr9aq5OfSg2S9pNtPA9hL1FVEAjvfOC4leW0SNf/mpnaakz2a9femSd6LqAww2RaFctwyf1lCqnTHuF1rxDg==",
+      "requires": {
+        "path-parse": "^1.0.6"
+      }
+    },
     "rimraf": {
       "version": "2.6.3",
       "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.6.3.tgz",
diff --git a/package.json b/package.json
index b7200db..ba0e134 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,7 @@
   },
   "dependencies": {
     "hosted-git-info": "^2.1.4",
-    "is-builtin-module": "^1.0.0",
+    "resolve": "^1.10.0",
     "semver": "2 || 3 || 4 || 5",
     "validate-npm-package-license": "^3.0.1"
   },
diff --git a/test/normalize.js b/test/normalize.js
index d6ef2b5..2b3fa54 100644
--- a/test/normalize.js
+++ b/test/normalize.js
@@ -62,22 +62,26 @@ tap.test("core module name", function(t) {
   function warn(m) {
     warnings.push(m)
   }
+  var coreModules = ["http", "_stream_writable"]
   var a
-  normalize(a={
-    name: "http",
-    readme: "read yourself how about",
-    homepage: 123,
-    bugs: "what is this i don't even",
-    repository: "Hello."
-  }, warn)
+  var expect = []
+  for (var i = 0; i < coreModules.length; ++i) {
+    normalize(a={
+      name: coreModules[i],
+      readme: "read yourself how about",
+      homepage: 123,
+      bugs: "what is this i don't even",
+      repository: "Hello."
+    }, warn)
 
-  var expect = [
-      safeFormat(warningMessages.conflictingName, 'http'),
+    expect = expect.concat([
+      safeFormat(warningMessages.conflictingName, coreModules[i]),
       warningMessages.nonEmailUrlBugsString,
       warningMessages.emptyNormalizedBugs,
       warningMessages.nonUrlHomepage,
       warningMessages.missingLicense
-      ]
+    ])
+  }
   t.same(warnings, expect)
   t.end()
 })