diff --git a/lib/mongo-sync.js b/lib/mongo-sync.js
index 59fd794..63187d7 100644
--- a/lib/mongo-sync.js
+++ b/lib/mongo-sync.js
@@ -56,11 +56,13 @@ Server.prototype.close = function() {
   this._server.close();
 };
 
-function DB(server, name, uri) {
+function DB(server, name, uri, db) {
   this._server = server;
   this._name = name;
   // TODO: reimplement this the proper way
-  if (uri) {
+  if (db) {
+    this._db = db;
+  } else if (uri) {
     this._db = mongodb.Db;
     this._db = sync('_db', 'connect').call(this, uri);
   } else {
diff --git a/package.json b/package.json
index 5e3eade..0a60144 100644
--- a/package.json
+++ b/package.json
@@ -35,7 +35,7 @@
     "node": ">= 0.10.0"
   },
   "dependencies": {
-    "mongodb": ">= 1.3.19"
+    "mongodb": "= 1.3.19"
   },
   "devDependencies": {
     "common-node": ">= 0.10.7",