diff --git a/packages/npm-mongo/.npm/package/npm-shrinkwrap.json b/packages/npm-mongo/.npm/package/npm-shrinkwrap.json
index d7f6f737ed..280ac71c4d 100644
--- a/packages/npm-mongo/.npm/package/npm-shrinkwrap.json
+++ b/packages/npm-mongo/.npm/package/npm-shrinkwrap.json
@@ -32,14 +32,12 @@
       "integrity": "sha1-u5NdSFgsuhaMBoNJV6VKPgcSTxE="
     },
     "mongodb": {
-      "version": "2.2.30",
-      "resolved": "https://registry.npmjs.org/mongodb/-/mongodb-2.2.30.tgz",
-      "integrity": "sha1-jM2AH2dsgXIEDC8rR+lgKg1WNKs="
+      "version": "https://github.com/meteor/node-mongodb-native/tarball/0f54d887aef0f172fd48cf4eafd0cf7e5a2500af",
+      "integrity": "sha1-g85f5sJslDKIfoLc/mjbVoN05gA="
     },
     "mongodb-core": {
-      "version": "2.1.14",
-      "resolved": "https://registry.npmjs.org/mongodb-core/-/mongodb-core-2.1.14.tgz",
-      "integrity": "sha1-E8uidkImtb49GJkq8Mljzl6g8P0="
+      "version": "https://github.com/meteor/mongodb-core/tarball/82608e807235ac744fc29d161ea1d75361a8f178",
+      "integrity": "sha1-DPVyqXHyrpzf9pQLWLq11vOJfk8="
     },
     "process-nextick-args": {
       "version": "1.0.7",
@@ -67,9 +65,9 @@
       "integrity": "sha512-kKvNJn6Mm93gAczWVJg7wH+wGYWNrDHdWvpUmHyEsgCtIwwo3bqPtV4tR5tuPaUhTOo/kvhVwd8XwwOllGYkbg=="
     },
     "semver": {
-      "version": "5.3.0",
-      "resolved": "https://registry.npmjs.org/semver/-/semver-5.3.0.tgz",
-      "integrity": "sha1-myzl094C0XxgEq0yaqa00M9U+U8="
+      "version": "5.4.1",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-5.4.1.tgz",
+      "integrity": "sha512-WfG/X9+oATh81XtllIo/I8gOiY9EXRdv1cQdyykeXK17YcUW3EXUAi2To4pcH6nZtJPr7ZOpM5OMyWJZm+8Rsg=="
     },
     "string_decoder": {
       "version": "1.0.3",
diff --git a/packages/npm-mongo/package.js b/packages/npm-mongo/package.js
index 84b27a141b..f7bc83881a 100644
--- a/packages/npm-mongo/package.js
+++ b/packages/npm-mongo/package.js
@@ -3,12 +3,17 @@
 
 Package.describe({
   summary: "Wrapper around the mongo npm package",
-  version: '2.2.30',
+  version: '2.2.31',
   documentation: null
 });
 
 Npm.depends({
-  mongodb: "2.2.30"
+  // Fork of mongodb@2.2.31 whose only change is pointing at a mongodb-core
+  // with https://github.com/mongodb-js/mongodb-core/pull/224
+  // NOTE: For the time being, we have hard-coded "2.2.31" as the version
+  // number in wrapper.js. When reverting back to non-fork, revert that
+  // change too!
+  mongodb: "https://github.com/meteor/node-mongodb-native/tarball/0f54d887aef0f172fd48cf4eafd0cf7e5a2500af",
 });
 
 Package.onUse(function (api) {
diff --git a/packages/npm-mongo/wrapper.js b/packages/npm-mongo/wrapper.js
index 2549e89754..7adcf42616 100644
--- a/packages/npm-mongo/wrapper.js
+++ b/packages/npm-mongo/wrapper.js
@@ -1,2 +1,9 @@
 NpmModuleMongodb = Npm.require('mongodb');
-NpmModuleMongodbVersion = Npm.require('mongodb/package.json').version;
+
+// Hard-code the version number of our fork. When we un-fork, revert this
+// change! Otherwise, NpmModuleMongodbVersion will either get the value of
+// "2.2.31" or the fork's URL, depending on in what order npm processes the
+// install commands.
+// Previously:
+// NpmModuleMongodbVersion = Npm.require('mongodb/package.json').version;
+NpmModuleMongodbVersion = "2.2.31";