diff --git a/pyproject.toml b/pyproject.toml
index 05c202b..9f8fa01 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "mcltspice"
-version = "2026.03.05"
+version = "2026.03.05.1"
 description = "MCP server for LTspice circuit simulation automation"
 readme = "README.md"
 requires-python = ">=3.11"
@@ -45,6 +45,9 @@ Repository = "https://git.supported.systems/MCP/mcltspice"
 requires = ["hatchling"]
 build-backend = "hatchling.build"
 
+[tool.hatch.build.targets.sdist]
+include = ["src/mcltspice", "pyproject.toml", "README.md", "LICENSE"]
+
 [tool.hatch.build.targets.wheel]
 packages = ["src/mcltspice"]