diff --git a/INSTALL b/INSTALL
index f86a464f80..e7bdb7020c 100644
--- a/INSTALL
+++ b/INSTALL
@@ -4,7 +4,7 @@ Installing trytond_product
 Prerequisites
 -------------
 
- * Python 2.6 or later (http://www.python.org/)
+ * Python 2.7 or later (http://www.python.org/)
  * trytond (http://www.tryton.org/)
  * python-sql (http://code.google.com/p/python-sql/)
 
diff --git a/category.xml b/category.xml
index 7cfc9379ea..52dcd41702 100644
--- a/category.xml
+++ b/category.xml
@@ -6,13 +6,13 @@ this repository contains the full copyright notices and license terms. -->
         <record model="ir.ui.view" id="category_view_list">
             <field name="model">product.category</field>
             <field name="type">tree</field>
-            <field name="priority">10</field>
+            <field name="priority" eval="10"/>
             <field name="name">category_list</field>
         </record>
         <record model="ir.ui.view" id="category_view_tree">
             <field name="model">product.category</field>
             <field name="type">tree</field>
-            <field name="priority">20</field>
+            <field name="priority" eval="20"/>
             <field name="field_childs">childs</field>
             <field name="name">category_tree</field>
         </record>
diff --git a/setup.py b/setup.py
index ca5f08c193..e35e894d52 100644
--- a/setup.py
+++ b/setup.py
@@ -67,7 +67,6 @@ setup(name='trytond_product',
         'Natural Language :: Slovenian',
         'Natural Language :: Spanish',
         'Operating System :: OS Independent',
-        'Programming Language :: Python :: 2.6',
         'Programming Language :: Python :: 2.7',
         'Topic :: Office/Business',
         ],