diff --git a/README.md b/README.md
index 2ed495a..4a83e9a 100644
--- a/README.md
+++ b/README.md
@@ -26,6 +26,15 @@ To use it you need `jugglingdb@0.2.x`.
     var schema = new Schema('mongodb');
     ...
     ```
+    You can also set some settings in your schema, as [write concern and journaling](http://docs.mongodb.org/manual/core/write-concern/):
+    ```javascript
+    var Schema = require('jugglingdb').Schema;
+    var schema = new Schema('mongodb', {
+        url: 'mongodb://localhost/myapp',
+        w: 1,
+        j: 1
+    });
+    ```
 
 ## Running tests
 
diff --git a/lib/mongodb.js b/lib/mongodb.js
index 685fb6e..40d9991 100644
--- a/lib/mongodb.js
+++ b/lib/mongodb.js
@@ -49,6 +49,12 @@ exports.initialize = function initializeSchema(schema, callback) {
 
     s.safe = s.safe || false;
 
+	//write concern
+    s.w = s.w || 0;
+
+    //journaling
+    s.j = s.j || false;
+
     schema.adapter = new MongoDB(s, schema, callback);
     schema.ObjectID = ObjectID;
 };
@@ -76,7 +82,7 @@ function MongoDB(s, schema, callback) {
         server = new mongodb.Server(s.host, s.port, {});
     }
 
-    new mongodb.Db(s.database, server, { safe: s.safe }).open(function (err, client) {
+    new mongodb.Db(s.database, server, { safe: s.safe, w: s.w, j: s.j }).open(function (err, client) {
         if (err) throw err;
         if (s.username && s.password) {
             var t = this;
@@ -118,7 +124,7 @@ MongoDB.prototype.collection = function (name) {
     return this.collections[name];
 };
 
-MongoDB.prototype.create = function (model, data, callback) {
+MongoDB.prototype.create = function (model, data, callback, modelConstructor, options) {
     if (data.id === null) {
         delete data.id;
     }
@@ -126,8 +132,19 @@ MongoDB.prototype.create = function (model, data, callback) {
         data._id = data.id;
         delete data.id;
     }
-    this.collection(model).insert(data, {}, function (err, m) {
-        callback(err, err ? null : m[0]._id);
+    if (!options) {
+        options = {};
+    }
+
+    //enable write concern if it's not specified
+    options.w = options.w || 1;
+
+    this.collection(model).insert(data, options, function (err, m) {
+        if (err || (options.w < 1)) {
+            callback(err, null);
+		} else {
+            callback(err, m[0]._id);
+        }
     });
 };
 
@@ -161,7 +178,7 @@ MongoDB.prototype.find = function find(model, id, callback) {
 };
 
 MongoDB.prototype.updateOrCreate = function updateOrCreate(model, data, callback) {
-    
+
     // set data.id as a mongodb object
     if (data.id) {
         if (typeof data.id === "string") {
@@ -178,7 +195,7 @@ MongoDB.prototype.updateOrCreate = function updateOrCreate(model, data, callback
     }
 
     this.collection(model).update({_id: data.id}, {$set: data}, {upsert: true, multi: false}, function(err, rowsAffected) {
-        callback(err, data);    
+        callback(err, data);
     });
 };
 
diff --git a/package.json b/package.json
index f870e27..d46050f 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
     "test": "make test"
   },
   "dependencies": {
-    "mongodb": "=0.9.9"
+    "mongodb": ">=0.9.9"
   },
   "devDependencies": {
     "jugglingdb": "https://github.com/1602/jugglingdb/archive/master.tar.gz",