diff --git a/trytond/CHANGELOG b/trytond/CHANGELOG
index cde4d6963c0..9e67117403d 100644
--- a/trytond/CHANGELOG
+++ b/trytond/CHANGELOG
@@ -1,3 +1,4 @@
+* Use JSONB to store MultiSelection field on PostgreSQL
 * Use multiple jobs to dump and restore a test database
 * Support database cache as template for tests
 
diff --git a/trytond/trytond/backend/postgresql/table.py b/trytond/trytond/backend/postgresql/table.py
index 8f387705d62..361556b9f60 100644
--- a/trytond/trytond/backend/postgresql/table.py
+++ b/trytond/trytond/backend/postgresql/table.py
@@ -329,6 +329,7 @@ def add_comment():
             if base_type != typname:
                 if (typname, base_type) in [
                         ('varchar', 'text'),
+                        ('varchar', 'jsonb'),
                         ('text', 'varchar'),
                         ('text', 'jsonb'),
                         ('date', 'timestamp'),
diff --git a/trytond/trytond/model/fields/multiselection.py b/trytond/trytond/model/fields/multiselection.py
index c34b21de530..fa86be2984d 100644
--- a/trytond/trytond/model/fields/multiselection.py
+++ b/trytond/trytond/model/fields/multiselection.py
@@ -18,7 +18,7 @@
 class MultiSelection(SelectionMixin, Field):
     "Define a multi-selection field."
     _type = 'multiselection'
-    _sql_type = 'VARCHAR'
+    _sql_type = 'JSON'
     _py_type = tuple
 
     def __init__(self, selection, string='', sort=True, translate=True,
diff --git a/trytond/trytond/tests/field_multiselection.py b/trytond/trytond/tests/field_multiselection.py
index bbb9f4e21cc..d2ccf0ad57c 100644
--- a/trytond/trytond/tests/field_multiselection.py
+++ b/trytond/trytond/tests/field_multiselection.py
@@ -38,8 +38,21 @@ class MultiSelectionRequired(ModelSQL):
         [('foo', "Foo"), ('bar', "Bar")], "Selects", required=True)
 
 
+class MultiSelectionText(ModelSQL):
+    "MultiSelection TEXT"
+    __name__ = 'test.multi_selection_text'
+
+    selects = fields.MultiSelection([
+            ('foo', "Foo"),
+            ('bar', "Bar"),
+            ('foobar', "FooBar"),
+            ], "Selections")
+    selects._sql_type = 'TEXT'
+
+
 def register(module):
     Pool.register(
         MultiSelection,
         MultiSelectionRequired,
+        MultiSelectionText,
         module=module, type_='model')
diff --git a/trytond/trytond/tests/test_field_multiselection.py b/trytond/trytond/tests/test_field_multiselection.py
index 881d59ecdac..c839a9eedc5 100644
--- a/trytond/trytond/tests/test_field_multiselection.py
+++ b/trytond/trytond/tests/test_field_multiselection.py
@@ -358,29 +358,48 @@ def test_read_string_dynamic_selection(self):
         self.assertEqual(bar_read['dyn_selects:string'], ["Bar", "Baz"])
         self.assertEqual(null_read['dyn_selects:string'], [])
 
+    @with_transaction()
+    def test_create_text(self):
+        "Test creating multiselection with text"
+        Selection = Pool().get('test.multi_selection_text')
 
-@unittest.skipIf(
-    backend.name != 'postgresql', 'jsonb only supported by postgresql')
-class FieldMultiSelectionJSONBTestCase(FieldMultiSelectionTestCase):
+        selection, selection_none = Selection.create([{
+                    'selects': ['foo', 'bar'],
+                    }, {
+                    'selects': None,
+                    }])
 
-    @classmethod
-    def setUpClass(cls):
-        super().setUpClass()
-        cls.setup_model()
+        self.assertEqual(selection.selects, ('bar', 'foo'))
+        self.assertEqual(selection_none.selects, ())
+
+    @with_transaction()
+    def test_write_text(self):
+        "Test write selection with text"
+        Selection = Pool().get('test.multi_selection_text')
+        selection, = Selection.create([{
+                    'selects': ['foo'],
+                    }])
+
+        Selection.write([selection], {
+                'selects': ['foo', 'bar'],
+                })
+
+        self.assertEqual(selection.selects, ('bar', 'foo'))
 
-    @classmethod
     @with_transaction()
-    def setup_model(cls):
-        connection = Transaction().connection
-        if backend.Database().get_version(connection) < (9, 2):
-            return
-        pool = Pool()
-        for model in ['test.multi_selection', 'test.multi_selection_required']:
-            Model = pool.get(model)
-            cursor = connection.cursor()
-            for name, field in Model._fields.items():
-                if field._type == 'multiselection':
-                    cursor.execute('ALTER TABLE "%s" '
-                        'ALTER COLUMN %s TYPE json USING %s::json' % (
-                            Model._table, name, name))
-        Transaction().commit()
+    def test_search_equals_text(self):
+        "Test search selection equals"
+        Selection = Pool().get('test.multi_selection_text')
+        selection, = Selection.create([{
+                    'selects': ['bar', 'foo'],
+                    }])
+
+        foo_bar = Selection.search([
+                ('selects', '=', ['foo', 'bar']),
+                ])
+        foo = Selection.search([
+                ('selects', '=', ['foo']),
+                ])
+
+        self.assertEqual(foo_bar, [selection])
+        self.assertEqual(foo, [])