diff --git a/README.rst b/README.rst
index 020295c..df5bb15 100644
--- a/README.rst
+++ b/README.rst
@@ -81,8 +81,7 @@ The JSON model files must conform to this schema:
     * join: list of join names, indicate that some joins must be used when using
       this dimension,
 
-    * type: indicate the type of the dimension, numerical, time-like,
-      geographical, duration, etc..
+    * type: indicate the type of the dimension: integer, string, bool, date
 
     * value: SQL expression giving the value for the dimension,
       it can be different than the value used for filtering or grouping,
diff --git a/bijoe/schemas.py b/bijoe/schemas.py
index e4a2fba..f1f00cb 100644
--- a/bijoe/schemas.py
+++ b/bijoe/schemas.py
@@ -250,6 +250,8 @@ class Dimension(Base):
                 pass
             return ' AND '.join(filters), values
         else:
+            if not isinstance(filter_values, list):
+                filter_values = [filter_values]
             if not filter_values:
                 return '', []
             if self.type == 'integer':
diff --git a/bijoe/templates/bijoe/cube_table.html b/bijoe/templates/bijoe/cube_table.html
index 8b1e314..d75728c 100644
--- a/bijoe/templates/bijoe/cube_table.html
+++ b/bijoe/templates/bijoe/cube_table.html
@@ -12,9 +12,8 @@
       {% for row in table.table %}
         <tr>
           {% for value in row %}
-          <td>
-            {% if value == None %}0{% else %}{{ value }}{% endif %}
-          </td>
+          {% comment %}Only django 1.10 allow is None/True/False{% endcomment %}
+          <td>{% if value|stringformat:"r" == "None" %}0{% elif value|stringformat:"r" == "True" %}{% trans "Oui" %}{% elif value|stringformat:"r" == "False" %}{% trans "Non" %}{% else %}{{ value }}{% endif %}</td>
           {% endfor %}
         </tr>
       {% endfor %}
diff --git a/bijoe/visualization/forms.py b/bijoe/visualization/forms.py
index 1ecb716..e46c89c 100644
--- a/bijoe/visualization/forms.py
+++ b/bijoe/visualization/forms.py
@@ -19,7 +19,7 @@ from django import forms
 from django.core.exceptions import ValidationError
 from django.utils.translation import ugettext as _
 from django.utils.safestring import mark_safe
-from django.forms import ModelForm, TextInput
+from django.forms import ModelForm, TextInput, NullBooleanField
 from django.conf import settings
 
 try:
@@ -179,6 +179,9 @@ class CubeForm(forms.Form):
             if dimension.type == 'date':
                 self.base_fields[field_name] = DateRangeField(
                     label=dimension.label.capitalize(), required=False)
+            elif dimension.type == 'bool':
+                self.base_fields[field_name] = NullBooleanField(
+                    label=dimension.label.capitalize(), required=False)
             else:
                 self.base_fields[field_name] = forms.MultipleChoiceField(
                     label=dimension.label.capitalize(),
diff --git a/bijoe/visualization/utils.py b/bijoe/visualization/utils.py
index f57412c..2fdd4f4 100644
--- a/bijoe/visualization/utils.py
+++ b/bijoe/visualization/utils.py
@@ -24,6 +24,7 @@ import copy
 
 from django.utils.safestring import mark_safe
 from django.utils.translation import ugettext_lazy as _
+from django.utils import six
 from django.core.cache import cache
 from django.http import Http404
 from django.conf import settings
@@ -120,17 +121,23 @@ class Visualization(object):
 
     @property
     def key(self):
-        l = [self.cube.engine.warehouse.name, self.cube.name]
+        keys = [self.cube.engine.warehouse.name, self.cube.name]
         if self.loop:
-            l.append(self.loop.name)
-        for kw, values in self.filters.iteritems():
-            if values:
-                if isinstance(values, dict):
-                    values = values.items()
-                l.append('$'.join([kw] + sorted(map(unicode, values))))
-        l += [dim.name for dim in self.drilldown]
-        l += [self.measure.name]
-        key = '$'.join(v.encode('utf8') for v in l)
+            keys.append(self.loop.name)
+        for kw, value in self.filters.iteritems():
+            if value is None:
+                continue
+            elif isinstance(value, (dict, list, tuple)):
+                # multiple values
+                if isinstance(value, dict):
+                    value = value.items()
+                keys.append('$'.join([kw] + sorted(map(six.text_type, value))))
+            else:
+                # scalar values
+                keys.append(u'%s$%s' % (kw, six.text_type(value)))
+        keys += [dim.name for dim in self.drilldown]
+        keys += [self.measure.name]
+        key = '$'.join(v.encode('utf8') for v in keys)
         return hashlib.md5(key).hexdigest()
 
     def stringified(self):
diff --git a/tests/fixtures/schema1/01_schema.json b/tests/fixtures/schema1/01_schema.json
index 3c8b3ae..823dfbe 100644
--- a/tests/fixtures/schema1/01_schema.json
+++ b/tests/fixtures/schema1/01_schema.json
@@ -74,6 +74,12 @@
                     "type": "date",
                     "value": "date"
                 },
+                {
+                    "name": "boolean",
+                    "label": "Boolean",
+                    "type": "bool",
+                    "value": "boolean"
+                },
                 {
                     "name": "hour",
                     "type": "integer",
diff --git a/tests/fixtures/schema1/01_schema.sql b/tests/fixtures/schema1/01_schema.sql
index 3a2eacd..da77db4 100644
--- a/tests/fixtures/schema1/01_schema.sql
+++ b/tests/fixtures/schema1/01_schema.sql
@@ -20,6 +20,7 @@ CREATE TABLE facts (
     date date,
     datetime timestamp with time zone,
     integer integer,
+    boolean boolean,
     cnt integer default(1),
     innersubcategory_id integer references schema1.subcategory(id),
     leftsubcategory_id integer references schema1.subcategory(id),
@@ -44,21 +45,21 @@ INSERT INTO subcategory (category_id, ord, label) VALUES
    (3, 0, 'subé9');
 
 
-INSERT INTO facts (date, datetime, integer, cnt, innersubcategory_id, leftsubcategory_id, rightsubcategory_id, outersubcategory_id) VALUES
-   ('2017-01-01', '2017-01-01 10:00', 1, 10, 1, 1, 1, 1),
-   ('2017-01-02', '2017-01-02 10:00', 1, 10, 3, 3, 3, 3),
-   ('2017-01-03', '2017-01-03 10:00', 1, 10, NULL, NULL, NULL, NULL),
-   ('2017-01-04', '2017-01-04 10:00', 1, 10, 1, 1, 1, 1),
-   ('2017-01-05', '2017-01-05 10:00', 1, 10, 1, 1, 1, 1),
-   ('2017-01-06', '2017-01-06 10:00', 1, 10, 1, 1, 1, 1),
-   ('2017-01-07', '2017-01-07 10:00', 1, 10, 1, 1, 1, 1),
-   ('2017-01-08', '2017-01-08 10:00', 1, 10, 1, 1, 1, 1),
-   ('2017-01-09', '2017-01-09 10:00', 1, 10, 1, 1, 1, 1),
-   ('2017-01-10', '2017-01-10 10:00', 1, 10, 1, 1, 1, 1),
-   ('2017-02-01', '2017-02-01 10:00', 1, 10, 1, 1, 1, 1),
-   ('2017-03-01', '2017-03-01 10:00', 1, 10, 1, 1, 1, 1),
-   ('2017-04-01', '2017-04-01 10:00', 1, 10, 1, 1, 1, 1),
-   ('2017-05-01', '2017-05-01 10:00', 1, 10, 1, 1, 1, 1),
-   ('2017-06-01', '2017-06-01 10:00', 1, 10, 1, 1, 1, 1),
-   ('2017-07-01', '2017-07-01 10:00', 1, 10, 1, 1, 1, 1),
-   ('2017-08-01', '2017-08-01 10:00', 1, 10, 1, 1, 1, 1);
+INSERT INTO facts (date, datetime, integer, boolean, cnt, innersubcategory_id, leftsubcategory_id, rightsubcategory_id, outersubcategory_id) VALUES
+   ('2017-01-01', '2017-01-01 10:00', 1, FALSE, 10, 1, 1, 1, 1),
+   ('2017-01-02', '2017-01-02 10:00', 1, TRUE, 10, 3, 3, 3, 3),
+   ('2017-01-03', '2017-01-03 10:00', 1, FALSE, 10, NULL, NULL, NULL, NULL),
+   ('2017-01-04', '2017-01-04 10:00', 1, FALSE, 10, 1, 1, 1, 1),
+   ('2017-01-05', '2017-01-05 10:00', 1, TRUE, 10, 1, 1, 1, 1),
+   ('2017-01-06', '2017-01-06 10:00', 1, FALSE, 10, 1, 1, 1, 1),
+   ('2017-01-07', '2017-01-07 10:00', 1, TRUE, 10, 1, 1, 1, 1),
+   ('2017-01-08', '2017-01-08 10:00', 1, FALSE, 10, 1, 1, 1, 1),
+   ('2017-01-09', '2017-01-09 10:00', 1, TRUE, 10, 1, 1, 1, 1),
+   ('2017-01-10', '2017-01-10 10:00', 1, FALSE, 10, 1, 1, 1, 1),
+   ('2017-02-01', '2017-02-01 10:00', 1, TRUE, 10, 1, 1, 1, 1),
+   ('2017-03-01', '2017-03-01 10:00', 1, FALSE, 10, 1, 1, 1, 1),
+   ('2017-04-01', '2017-04-01 10:00', 1, TRUE, 10, 1, 1, 1, 1),
+   ('2017-05-01', '2017-05-01 10:00', 1, FALSE, 10, 1, 1, 1, 1),
+   ('2017-06-01', '2017-06-01 10:00', 1, TRUE, 10, 1, 1, 1, 1),
+   ('2017-07-01', '2017-07-01 10:00', 1, FALSE, 10, 1, 1, 1, 1),
+   ('2017-08-01', '2017-08-01 10:00', 1, TRUE, 10, 1, 1, 1, 1);
diff --git a/tests/test_schema1.py b/tests/test_schema1.py
index 60c3606..9d79d72 100644
--- a/tests/test_schema1.py
+++ b/tests/test_schema1.py
@@ -53,3 +53,18 @@ def test_truncated_previous_year_range(schema1, app, admin, freezer):
         ['2017', '10', '1', '1', '1', '1', '1', '1', '1', '17'],
         ['Total', '10', '1', '1', '1', '1', '1', '1', '1', '17'],
     ]
+
+
+def test_boolean_dimension(schema1, app, admin):
+    login(app, admin)
+    response = app.get('/').follow()
+    response = response.click('Facts 1')
+    form = response.form
+    form.set('representation', 'table')
+    form.set('measure', 'simple_count')
+    form.set('drilldown_x', 'boolean')
+    response = form.submit('visualize')
+    assert get_table(response) == [['Boolean', 'Non', 'Oui'], ['number of rows', '9', '8']]
+    form.set('filter__boolean', [o[0] for o in form.fields['filter__boolean'][0].options if o[2] == 'Oui'][0])
+    response = form.submit('visualize')
+    assert get_table(response) == [['Boolean', 'Oui'], ['number of rows', '8']]
diff --git a/tests/utils.py b/tests/utils.py
index 5f4794b..4a6956e 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -26,6 +26,6 @@ def get_table(response):
         row = []
         table.append(row)
         for td in tr.findall('td'):
-            row.append(td.text.strip())
+            row.append((td.text or '').strip())
     return table