diff --git a/carculator_bus/__init__.py b/carculator_bus/__init__.py
index 1dca675..6b53fd3 100644
--- a/carculator_bus/__init__.py
+++ b/carculator_bus/__init__.py
@@ -19,7 +19,7 @@
 )
 
 # library version
-__version__ = (0, 0, 8)
+__version__ = (0, 1, 0, "dev0")
 
 from pathlib import Path
 
diff --git a/carculator_bus/inventory.py b/carculator_bus/inventory.py
index d7068eb..c84a8a4 100644
--- a/carculator_bus/inventory.py
+++ b/carculator_bus/inventory.py
@@ -3,11 +3,12 @@
 """
 
 import numpy as np
+import warnings
 from carculator_utils.inventory import Inventory
 
 from . import DATA_DIR
 
-np.warnings.filterwarnings("ignore", category=np.VisibleDeprecationWarning)
+warnings.filterwarnings("ignore", category=np.VisibleDeprecationWarning)
 
 IAM_FILES_DIR = DATA_DIR / "IAM"
 
diff --git a/requirements.txt b/requirements.txt
index fa13629..2689f56 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,2 @@
-carculator_utils
+carculator_utils==1.2.0.dev0
 prettytable
\ No newline at end of file
diff --git a/setup.py b/setup.py
index ede6492..8b56115 100644
--- a/setup.py
+++ b/setup.py
@@ -33,7 +33,7 @@ def package_files(directory):
 
 setup(
     name="carculator_bus",
-    version="0.0.8",
+    version="0.1.0.dev0",
     packages=packages,
     author="Romain Sacchi <romain.sacchi@psi.ch>",
     license=open("LICENSE").read(),
@@ -41,7 +41,7 @@ def package_files(directory):
         "carculator_bus": package_files(os.path.join("carculator_bus", "data"))
     },
     install_requires=[
-        "carculator_utils",
+        "carculator_utils==1.2.0.dev0",
         "prettytable",
     ],
     url="https://github.com/romainsacchi/carculator_bus",