diff --git a/pyproject.toml b/pyproject.toml
index 746c398..4ce9b28 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,6 +29,13 @@ build-backend = "hatchling.build"
 [tool.hatch.build.targets.wheel]
 packages = ["src/rmbg_as_a_service"]
 
+[tool.hatch.build.targets.sdist]
+include = [
+    "src/rmbg_as_a_service",
+    "README.md",
+    "pyproject.toml",
+]
+
 # BiRefNet (torch) needs CUDA wheels; pull torch/torchvision from the PyTorch index.
 [[tool.uv.index]]
 name = "pytorch-cu126"