diff --git a/docs/conf.py b/docs/conf.py
index 1db3fe9..9dc3eb5 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -22,7 +22,7 @@
 author = 'Benjamin DONNOT'
 
 # The full version, including alpha/beta/rc tags
-release = "0.9.0.dev1"
+release = "0.9.0"
 version = '0.9'
 
 # -- General configuration ---------------------------------------------------
diff --git a/lightsim2grid/__init__.py b/lightsim2grid/__init__.py
index d0e810a..c109ead 100644
--- a/lightsim2grid/__init__.py
+++ b/lightsim2grid/__init__.py
@@ -6,7 +6,7 @@
 # SPDX-License-Identifier: MPL-2.0
 # This file is part of LightSim2grid, LightSim2grid implements a c++ backend targeting the Grid2Op platform.
 
-__version__ = "0.9.0.dev1"
+__version__ = "0.9.0"
 
 __all__ = ["newtonpf", "SolverType", "ErrorType", "solver", "compilation_options"]
 
diff --git a/setup.py b/setup.py
index ff15635..a5f6182 100644
--- a/setup.py
+++ b/setup.py
@@ -14,7 +14,7 @@
 from pybind11.setup_helpers import Pybind11Extension, build_ext
 
 
-__version__ = "0.9.0.dev1"
+__version__ = "0.9.0"
 KLU_SOLVER_AVAILABLE = False
 
 # Try to link against SuiteSparse (if available)