diff --git a/models/ir_model_data.py b/models/ir_model_data.py
index 0328cc5e29b2c4bd9e6cf2366d3fb0899c875b29_bW9kZWxzL2lyX21vZGVsX2RhdGEucHk=..ce2b2a31d539d6fd773bf6882137a79dffc9ade4_bW9kZWxzL2lyX21vZGVsX2RhdGEucHk= 100644
--- a/models/ir_model_data.py
+++ b/models/ir_model_data.py
@@ -19,7 +19,8 @@
 ##############################################################################
 
 import uuid
+from typing import Final
 
 from odoo import api, models  # type: ignore[import-untyped]
 
 # Xrefs are stored within "ir.model.data" with this module name.
@@ -22,8 +23,8 @@
 
 from odoo import api, models  # type: ignore[import-untyped]
 
 # Xrefs are stored within "ir.model.data" with this module name.
-_XREF_IMD_MODULE = "__converter__"
+_XREF_IMD_MODULE: Final[str] = "__converter__"
 
 
 class IrModelData(models.BaseModel):
diff --git a/pyproject.toml b/pyproject.toml
index 0328cc5e29b2c4bd9e6cf2366d3fb0899c875b29_cHlwcm9qZWN0LnRvbWw=..ce2b2a31d539d6fd773bf6882137a79dffc9ade4_cHlwcm9qZWN0LnRvbWw= 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -58,6 +58,7 @@
 
 [tool.hatch.version]
 source = "vcs"
+fallback-version = "18.0.0.0.0"
 
 [tool.ruff]
 target-version = "py310"