diff --git a/setup/_metapackage/VERSION.txt b/setup/_metapackage/VERSION.txt
index b3994c7b..e3c30b18 100644
--- a/setup/_metapackage/VERSION.txt
+++ b/setup/_metapackage/VERSION.txt
@@ -1 +1 @@
-13.0.20211016.0
\ No newline at end of file
+13.0.20211204.0
\ No newline at end of file
diff --git a/setup/_metapackage/setup.py b/setup/_metapackage/setup.py
index d877ea05..201fc2b3 100644
--- a/setup/_metapackage/setup.py
+++ b/setup/_metapackage/setup.py
@@ -8,6 +8,7 @@ setuptools.setup(
     description="Meta package for oca-knowledge Odoo addons",
     version=version,
     install_requires=[
+        'odoo13-addon-attachment_category',
         'odoo13-addon-document_page',
         'odoo13-addon-document_page_approval',
         'odoo13-addon-document_page_group',