diff --git a/report_py3o/migrations/13.0.1.0.0/post-migration.py b/report_py3o/migrations/13.0.1.0.0/post-migration.py
new file mode 100644
index 000000000..bb21c3b1e
--- /dev/null
+++ b/report_py3o/migrations/13.0.1.0.0/post-migration.py
@@ -0,0 +1,14 @@
+# Copyright 2020 ForgeFlow <http://www.forgeflow.com>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+from openupgradelib import openupgrade
+
+
+@openupgrade.migrate()
+def migrate(env, version):
+    openupgrade.logged_query(
+        env.cr, """SELECT id, py3o_template_data FROM py3o_template"""
+    )
+    templates = env.cr.fetchall()
+    for template_id, data in templates:
+        template = env["py3o.template"].browse(template_id)
+        template.write({"py3o_template_data": bytes(data)})