diff --git a/package.json b/package.json
index 64b64f4..5b4d3ba 100644
--- a/package.json
+++ b/package.json
@@ -17,6 +17,7 @@
     "lowdb": "^0.5.1",
     "method-override": "^2.1.2",
     "morgan": "^1.3.1",
+    "node-uuid": "^1.4.2",
     "serve-static": "^1.6.1",
     "superagent": "^0.15.7",
     "underscore": "^1.5.2",
diff --git a/src/utils.js b/src/utils.js
index afd41e1..ed4807f 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -1,4 +1,5 @@
 var _ = require('underscore')
+var uuid = require('node-uuid')
 var _inflections = require('underscore.inflections')
 _.mixin(_inflections)
 
@@ -19,14 +20,22 @@ function toNative(value) {
   return value
 }
 
-// Creates incremental id.
+// Return incremented id or uuid
 function createId(coll) {
   if (_.isEmpty(coll)) {
     return 1
   } else {
-    return _.max(coll, function(doc) {
+    var id = _.max(coll, function(doc) {
       return doc.id
-    }).id + 1
+    }).id
+
+    if (_.isFinite(id)) {
+      // Increment integer id
+      return ++id
+    } else {
+      // Generate string id
+      return uuid()
+    }
   }
 }
 
diff --git a/test/index.js b/test/index.js
index 910e32e..b56f145 100644
--- a/test/index.js
+++ b/test/index.js
@@ -29,6 +29,10 @@ describe('Server', function() {
       {id: 5, published: false, postId: 2},
     ]
 
+    db.refs = [
+      {id: 'abcd-1234', url: 'http://example.com', postId: 1}
+    ]
+
     server = jsonServer(db)
   })
 
@@ -166,19 +170,34 @@ describe('Server', function() {
 
 
   describe('POST /:resource', function() {
-    it('should respond with json and create a resource', function(done) {
-      request(server)
-        .post('/posts')
-        .send({body: 'foo', booleanValue: 'true', integerValue: '1'})
-        .expect('Content-Type', /json/)
-        .expect({id: 3, body: 'foo', booleanValue: true, integerValue: 1})
-        .expect(200)
-        .end(function(err, res){
-          if (err) return done(err)
-          assert.equal(db.posts.length, 3)
-          done()
-        })
-    })
+    it('should respond with json, create a resource and increment id',
+      function(done) {
+        request(server)
+          .post('/posts')
+          .send({body: 'foo', booleanValue: 'true', integerValue: '1'})
+          .expect('Content-Type', /json/)
+          .expect({id: 3, body: 'foo', booleanValue: true, integerValue: 1})
+          .expect(200)
+          .end(function(err, res){
+            if (err) return done(err)
+            assert.equal(db.posts.length, 3)
+            done()
+          })
+      })
+
+    it('should respond with json, create a resource and generate string id',
+      function(done) {
+        request(server)
+          .post('/refs')
+          .send({url: 'http://foo.com', postId: '1'})
+          .expect('Content-Type', /json/)
+          .expect(200)
+          .end(function(err, res){
+            if (err) return done(err)
+            assert.equal(db.refs.length, 2)
+            done()
+          })
+      })
   })
 
   describe('PUT /:resource/:id', function() {
diff --git a/test/utils.js b/test/utils.js
index 4aaa3f5..5a4ed97 100644
--- a/test/utils.js
+++ b/test/utils.js
@@ -24,7 +24,7 @@ describe('utils', function() {
         { name: 'comments', id: 3 }
       ]
 
-      assert.deepEqual(expected, utils.getRemovable(db))
+      assert.deepEqual(utils.getRemovable(db), expected)
 
     })
   })