diff --git a/biobb_chemistry/ambertools/reduce_remove_hydrogens.py b/biobb_chemistry/ambertools/reduce_remove_hydrogens.py
index 5744b76..b23e33a 100755
--- a/biobb_chemistry/ambertools/reduce_remove_hydrogens.py
+++ b/biobb_chemistry/ambertools/reduce_remove_hydrogens.py
@@ -4,6 +4,7 @@
 import argparse
 from biobb_common.generic.biobb_object import BiobbObject
 from biobb_common.configuration import settings
+import biobb_common.tools.file_utils as fu
 from biobb_common.tools.file_utils import launchlogger
 from biobb_chemistry.ambertools.common import get_binary_path, check_input_path, check_output_path
 
diff --git a/biobb_chemistry/py.typed b/biobb_chemistry/py.typed
new file mode 100644
index 0000000..e69de29
diff --git a/biobb_chemistry/test/conf.yml b/biobb_chemistry/test/conf.yml
index 0d92245..ad6da41 100755
--- a/biobb_chemistry/test/conf.yml
+++ b/biobb_chemistry/test/conf.yml
@@ -1,4 +1,5 @@
-working_dir_path: /tmp/biobb/unitests
+global_properties:
+  working_dir_path: /tmp/biobb/unitests
 
 babel_convert:
   paths:
diff --git a/setup.py b/setup.py
index b558c89..701d8b7 100644
--- a/setup.py
+++ b/setup.py
@@ -18,6 +18,7 @@
         "Bioexcel": "https://bioexcel.eu/"
     },
     packages=setuptools.find_packages(exclude=['docs', 'test']),
+    package_data={'biobb_chemistry': ['py.typed']},
     install_requires=['biobb_common==4.2.0'],
     python_requires='>=3.8',
     entry_points={