diff --git a/src/tcutility/data/atom_data_info/__init__.py b/src/tcutility/data/_atom_data_info/__init__.py
similarity index 100%
rename from src/tcutility/data/atom_data_info/__init__.py
rename to src/tcutility/data/_atom_data_info/__init__.py
diff --git a/src/tcutility/data/atom_data_info/color.txt b/src/tcutility/data/_atom_data_info/color.txt
similarity index 100%
rename from src/tcutility/data/atom_data_info/color.txt
rename to src/tcutility/data/_atom_data_info/color.txt
diff --git a/src/tcutility/data/atom_data_info/name.txt b/src/tcutility/data/_atom_data_info/name.txt
similarity index 100%
rename from src/tcutility/data/atom_data_info/name.txt
rename to src/tcutility/data/_atom_data_info/name.txt
diff --git a/src/tcutility/data/atom_data_info/radius.txt b/src/tcutility/data/_atom_data_info/radius.txt
similarity index 100%
rename from src/tcutility/data/atom_data_info/radius.txt
rename to src/tcutility/data/_atom_data_info/radius.txt
diff --git a/src/tcutility/data/atom_data_info/symbol.txt b/src/tcutility/data/_atom_data_info/symbol.txt
similarity index 100%
rename from src/tcutility/data/atom_data_info/symbol.txt
rename to src/tcutility/data/_atom_data_info/symbol.txt
diff --git a/src/tcutility/data/atom.py b/src/tcutility/data/atom.py
index 22d8ccec..e935926e 100644
--- a/src/tcutility/data/atom.py
+++ b/src/tcutility/data/atom.py
@@ -2,7 +2,7 @@
 
 
 # read data
-data_dir = pl.Path(__file__).parents[0] / "atom_data_info"
+data_dir = pl.Path(__file__).parents[0] / "_atom_data_info"
 
 with open(data_dir / "name.txt") as data:
     lines = data.readlines()