diff --git a/pyproject.toml b/pyproject.toml
index c637b1d..20c02bf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -22,3 +22,6 @@ include = [
     "cloudflare_error_page/*.py",
     "cloudflare_error_page/templates/*",
 ]
+
+[tool.hatch.version]
+path = "cloudflare_error_page/__init__.py"