diff --git a/package-lock.json b/package-lock.json
index afc5e31f5e8..caf39cb8fc3 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14774,19 +14774,20 @@
       }
     },
     "mongodb": {
-      "version": "3.3.2",
-      "resolved": "https://registry.npmjs.org/mongodb/-/mongodb-3.3.2.tgz",
-      "integrity": "sha512-fqJt3iywelk4yKu/lfwQg163Bjpo5zDKhXiohycvon4iQHbrfflSAz9AIlRE6496Pm/dQKQK5bMigdVo2s6gBg==",
+      "version": "3.3.4",
+      "resolved": "https://registry.npmjs.org/mongodb/-/mongodb-3.3.4.tgz",
+      "integrity": "sha512-6fmHu3FJTpeZxacJcfjUGIP3BSteG0l2cxLkSrf1nnnS1OrlnVGiP9P/wAC4aB6dM6H4vQ2io8YDjkuPkje7AA==",
       "requires": {
         "bson": "^1.1.1",
         "require_optional": "^1.0.1",
-        "safe-buffer": "^5.1.2"
+        "safe-buffer": "^5.1.2",
+        "saslprep": "^1.0.0"
       },
       "dependencies": {
         "bson": {
-          "version": "1.1.1",
-          "resolved": "https://registry.npmjs.org/bson/-/bson-1.1.1.tgz",
-          "integrity": "sha512-jCGVYLoYMHDkOsbwJZBCqwMHyH4c+wzgI9hG7Z6SZJRXWr+x58pdIbm2i9a/jFGCkRJqRUr8eoI7lDWa0hTkxg=="
+          "version": "1.1.3",
+          "resolved": "https://registry.npmjs.org/bson/-/bson-1.1.3.tgz",
+          "integrity": "sha512-TdiJxMVnodVS7r0BdL42y/pqC9cL2iKynVwA0Ho3qbsQYr428veL3l7BQyuqiw+Q5SqqoT0m4srSY/BlZ9AxXg=="
         }
       }
     },
@@ -15263,9 +15264,9 @@
       }
     },
     "mongodb-data-service": {
-      "version": "15.3.2",
-      "resolved": "https://registry.npmjs.org/mongodb-data-service/-/mongodb-data-service-15.3.2.tgz",
-      "integrity": "sha512-MDbqd1tk0u3M34Lkz69nhycAF6dg3d40s/BkPFFLthrHCh2EcA7LNfxyPjN3Aobm3vp6HAr6WSTHueT8dFd1Kw==",
+      "version": "15.4.0",
+      "resolved": "https://registry.npmjs.org/mongodb-data-service/-/mongodb-data-service-15.4.0.tgz",
+      "integrity": "sha512-l/59ZLc10r3DeOzbX8BNCBLqzRSCxjyk9MzX2lxxO4Db90DC2RtHCHpUlN1Ba1AfsBHm4Pr+rtMz14vmesIMXQ==",
       "requires": {
         "async": "^2.3.0",
         "debug": "^2.6.0",
@@ -15284,10 +15285,9 @@
         "lodash.partial": "^4.2.1",
         "lodash.union": "^4.6.0",
         "lodash.uniqby": "^4.5.0",
-        "mongodb": "^3.3.2",
+        "mongodb": "^3.3.4",
         "mongodb-collection-sample": "^4.4.3",
         "mongodb-connection-model": "^14.3.2",
-        "mongodb-core": "^3.2.7",
         "mongodb-index-model": "^2.3.0",
         "mongodb-js-errors": "^0.3.3",
         "mongodb-ns": "^2.0.0",
diff --git a/package.json b/package.json
index a9907fe7b11..ba70c9a2915 100644
--- a/package.json
+++ b/package.json
@@ -365,15 +365,14 @@
     "lodash": "^3.10.1",
     "marky": "^1.2.0",
     "moment": "^2.10.6",
-    "mongodb": "^3.3.2",
+    "mongodb": "^3.3.4",
     "mongodb-ace-autocompleter": "^0.3.3",
     "mongodb-ace-mode": "^0.4.0",
     "mongodb-ace-theme": "^0.0.1",
     "mongodb-ace-theme-query": "^0.0.2",
     "mongodb-collection-model": "^2.0.4",
     "mongodb-connection-model": "^14.3.2",
-    "mongodb-core": "^3.2.7",
-    "mongodb-data-service": "^15.3.2",
+    "mongodb-data-service": "^15.4.0",
     "mongodb-database-model": "^0.1.3",
     "mongodb-explain-plan-model": "^0.2.2",
     "mongodb-extended-json": "^1.10.2",
diff --git a/src/app/migrations/legacy-connection.js b/src/app/migrations/legacy-connection.js
index b410d69efe7..71d63a09fef 100644
--- a/src/app/migrations/legacy-connection.js
+++ b/src/app/migrations/legacy-connection.js
@@ -2,7 +2,7 @@ var toURL = require('url').format;
 var format = require('util').format;
 var AmpersandModel = require('ampersand-model');
 var AmpersandCollection = require('ampersand-rest-collection');
-var ReadPreference = require('mongodb-core').ReadPreference;
+var ReadPreference = require('mongodb').ReadPreference;
 var assign = require('lodash.assign');
 var defaults = require('lodash.defaults');
 var clone = require('lodash.clone');