diff --git a/setup/_metapackage/VERSION.txt b/setup/_metapackage/VERSION.txt
index 2c0ba3ef..f7a8fb33 100644
--- a/setup/_metapackage/VERSION.txt
+++ b/setup/_metapackage/VERSION.txt
@@ -1 +1 @@
-12.0.20210108.0
\ No newline at end of file
+12.0.20210820.0
\ No newline at end of file
diff --git a/setup/_metapackage/setup.py b/setup/_metapackage/setup.py
index 32863c0d..47b83d56 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=[
+        'odoo12-addon-attachment_category',
         'odoo12-addon-attachment_preview',
         'odoo12-addon-document_page',
         'odoo12-addon-document_page_approval',