diff --git a/setup.py b/setup.py
index 712d46b..4474c61 100644
--- a/setup.py
+++ b/setup.py
@@ -1,6 +1,7 @@
 # encoding: utf-8
 from distutils.core import setup
 from setuptools import find_packages
+import sqlquerybuilder
 
 setup(
     name='sqlquerybuilder',
@@ -8,6 +9,7 @@ setup(
     author='José Sánchez Moreno',
     author_email='jose@o2w.es',
     packages=find_packages(),
+    test_suite="tests",
     license='MIT',
     description=u'SQL Query Builder inspired on django ORM Syntax',
     long_description=open('README.rst').read(),
@@ -22,6 +24,7 @@ setup(
         'Operating System :: Microsoft :: Windows',
         'Operating System :: POSIX',
         'Programming Language :: Python',
+        'Programming Language :: SQL',
     ],
 
 )
diff --git a/sqlquerybuilder/__init__.py b/sqlquerybuilder/__init__.py
index a1141c2..f6e5e38 100644
--- a/sqlquerybuilder/__init__.py
+++ b/sqlquerybuilder/__init__.py
@@ -1,5 +1,6 @@
 import datetime
 import copy
+import collections
 
 VERSION = "0.0.3"
 
@@ -76,10 +77,9 @@ class F(object):
 
 class Q(QMixin):
     lookup_types = [
-        'iexact', 'contains', 'icontains',
-        'startswith', 'istartswith', 'endswith', 'iendswith', 'year',
-        'month', 'day', 'week_day', 'hour', 'minute', 'second',
-        'isnull', 'search', 'regex', 'iregex']
+        'icontains', 'istartswith',  'iendswith',
+        'year', 'month', 'day', 'week_day', 'hour', 'minute', 'second',
+        'isnull', 'in']
 
     op_map = {
         'lte': '<=',
@@ -101,7 +101,7 @@ class Q(QMixin):
 
     def _get_value(self, value):
         if isinstance(value, int) or isinstance(value, float):
-            return value
+            return str(value)
 
         if isinstance(value, datetime.datetime):
             return "'%s'" % value.strftime("%Y-%m-%d %H:%M:%S")
@@ -109,6 +109,9 @@ class Q(QMixin):
         if isinstance(value, datetime.date):
             return "'%s'" % value.strftime("%Y-%m-%d")
 
+        if isinstance(value, list) or isinstance(value, set):
+            return ", ".join([self._get_value(item) for item in value])
+
         if isinstance(value, F):
             return value
 
@@ -132,6 +135,9 @@ class Q(QMixin):
             if lookup == "istartwith":
                 return "{0} like '{1}%'".format(column, value)
 
+            if lookup == "in" and value:
+                return "{0} in ({1})".format(column, self._get_value(value))
+
             if lookup == 'isnull':
                 op = ""
                 if not value:
diff --git a/sqlquerybuilder/tests.py b/sqlquerybuilder/tests.py
index 2c0b9a1..7c0185c 100644
--- a/sqlquerybuilder/tests.py
+++ b/sqlquerybuilder/tests.py
@@ -29,7 +29,7 @@ class TestSqlBuilder(unittest.TestCase):
     def test_compound(self):
         qs = Queryset("users", "SQL_SERVER")\
             .filter(nombre="jose")\
-            .order_by( "nombre", "-fecha")\
+            .order_by("nombre", "-fecha")\
             .filter(fecha__lte=F("now()"))[:10]
 
         self.assertEqual(
@@ -61,5 +61,17 @@ class TestSqlBuilder(unittest.TestCase):
         self.assertEqual(
             str(sql), "SELECT name, date, tlf , count(*) as total FROM users WHERE ((name='jhon') AND NOT (DATEPART('year', date)<=1977))")
 
+    def test_in(self,):
+        sql = Queryset("users")
+        sql = sql.filter(name__in=["jose", "andres"])
+        self.assertEqual(
+            str(sql), "SELECT * FROM users WHERE (name in ('jose', 'andres'))")
+
+        sql = Queryset("users")
+        sql = sql.filter(year__in=[2012, 2014, "jose"])
+        self.assertEqual(
+            str(sql), "SELECT * FROM users WHERE (year in (2012, 2014, 'jose'))")
+
+
 if __name__ == '__main__':
     unittest.main()