diff --git a/pyproject.toml b/pyproject.toml
index 6d893f1..512d6cc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,16 +6,18 @@ build-backend = "hatchling.build"
 path = "reqif/__init__.py"
 
 [tool.hatch.build]
+exclude = [
+  "/.*",
+  "/tests",
+]
+
+[tool.hatch.build.targets.sdist]
 include = [
   "LICENSE",
   "README.md",
   "pyproject.toml",
   "reqif/"
 ]
-exclude = [
-  "/.*",
-  "/tests",
-]
 
 [project]
 name = "reqif"