diff --git a/setup.py b/setup.py
index 837a15ab..2a9a6df1 100644
--- a/setup.py
+++ b/setup.py
@@ -22,7 +22,8 @@
 source_MMmo = source_MM / "mulensobjects"
 
 # Read all files from data/ in format adequate for data_files option of setup.
-files = [
+files = [file_required.relative_to(PROJECT_PATH)]
+files += [
     f.relative_to(PROJECT_PATH) for f in DATA_PATH.rglob("*") if f.is_file()]
 data_files = {str(f): str(f) for f in files}
 
diff --git a/source/MulensModel/version.py b/source/MulensModel/version.py
index 55e47090..3a5935a2 100644
--- a/source/MulensModel/version.py
+++ b/source/MulensModel/version.py
@@ -1 +1 @@
-__version__ = "2.3.0"
+__version__ = "2.3.1"