diff --git a/carculator_truck/__init__.py b/carculator_truck/__init__.py
index 6122281..8ff0b04 100644
--- a/carculator_truck/__init__.py
+++ b/carculator_truck/__init__.py
@@ -18,7 +18,7 @@
 )
 
 # library version
-__version__ = (0, 4, 0)
+__version__ = (0, 5, 0, "dev0")
 
 from pathlib import Path
 
diff --git a/requirements.txt b/requirements.txt
index 864a3e4..d07f474 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,2 @@
-carculator-utils
+carculator-utils>=1.2.0.dev5
 prettytable
\ No newline at end of file
diff --git a/setup.py b/setup.py
index acd880a..6cca697 100644
--- a/setup.py
+++ b/setup.py
@@ -33,14 +33,14 @@ def package_files(directory):
 
 setup(
     name="carculator_truck",
-    version="0.4.0",
+    version="0.5.0.dev0",
     packages=packages,
     author="Romain Sacchi <romain.sacchi@psi.ch>",
     license=open("LICENSE").read(),
     package_data={
         "carculator_truck": package_files(os.path.join("carculator_truck", "data"))
     },
-    install_requires=["carculator_utils", "prettytable"],
+    install_requires=["carculator_utils>=1.2.0.dev5", "prettytable"],
     url="https://github.com/romainsacchi/carculator_truck",
     description="Prospective environmental and economic life cycle assessment"
     "of medium and heavy goods vehicles",