diff --git a/pyproject.toml b/pyproject.toml
index badf906..7805e01 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,8 +5,8 @@ description = "Python package for processing, enriching, and converting microtit
 authors = ["haeussma <83341109+haeussma@users.noreply.github.com>"]
 license = "MIT License"
 readme = "README.md"
-packages = [{ include = "MTPHandler" }]
-include = ["MTPHandler/units/ontomaps.toml"]
+packages = [{ include = "mtphandler" }]
+include = ["mtphandler/units/ontomaps.toml"]
 
 
 [tool.poetry.dependencies]
@@ -38,4 +38,4 @@ requires = ["poetry-core"]
 build-backend = "poetry.core.masonry.api"
 
 [tool.mypy]
-ignore_missing_imports = true
\ No newline at end of file
+ignore_missing_imports = true