diff --git a/CMakeLists.txt b/CMakeLists.txt
index fe21ba339..df28e82ba 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,198 +1,198 @@
 #===============================================================================
 # @file   CMakeLists.txt
 #
 # @author Guillaume Anciaux <guillaume.anciaux@epfl.ch>
 # @author Nicolas Richart <nicolas.richart@epfl.ch>
 #
 # @date creation: Mon Jun 14 2010
 # @date last modification: Fri Jan 22 2016
 #
 # @brief  main configuration file
 #
 # @section LICENSE
 #
 # Copyright (©)  2010-2012, 2014,  2015 EPFL  (Ecole Polytechnique  Fédérale de
 # Lausanne)  Laboratory (LSMS  -  Laboratoire de  Simulation  en Mécanique  des
 # Solides)
 #
 # Akantu is free  software: you can redistribute it and/or  modify it under the
 # terms  of the  GNU Lesser  General Public  License as  published by  the Free
 # Software Foundation, either version 3 of the License, or (at your option) any
 # later version.
 #
 # Akantu is  distributed in the  hope that it  will be useful, but  WITHOUT ANY
 # WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 # A  PARTICULAR PURPOSE. See  the GNU  Lesser General  Public License  for more
 # details.
 #
 # You should  have received  a copy  of the GNU  Lesser General  Public License
 # along with Akantu. If not, see <http://www.gnu.org/licenses/>.
 #
 # @section DESCRIPTION
 #-------------------------------------------------------------------------------
 #                      _               _
 #                     | |             | |
 #                 __ _| | ____ _ _ __ | |_ _   _
 #                / _` | |/ / _` | '_ \| __| | | |
 #               | (_| |   < (_| | | | | |_| |_| |
 #                \__,_|_|\_\__,_|_| |_|\__|\__,_|
 #
 #===============================================================================
 
 #===============================================================================
 # CMake Project
 #===============================================================================
 cmake_minimum_required(VERSION 3.1.3)
 
 # add this options before PROJECT keyword
 set(CMAKE_DISABLE_SOURCE_CHANGES ON)
 set(CMAKE_DISABLE_IN_SOURCE_BUILD ON)
 
 project(Akantu)
 enable_language(CXX)
 
 #===============================================================================
 # Misc. config for cmake
 #===============================================================================
 set(AKANTU_CMAKE_DIR "${PROJECT_SOURCE_DIR}/cmake")
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${PROJECT_SOURCE_DIR}/cmake")
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${PROJECT_SOURCE_DIR}/cmake/Modules")
 
 set(BUILD_SHARED_LIBS ON CACHE BOOL "Build shared libraries.")
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON CACHE BOOL
   "Enable/Disable output of compile commands during generation" FORCE)
 
 mark_as_advanced(BUILD_SHARED_LIBS)
 
 if(NOT AKANTU_TARGETS_EXPORT)
   set(AKANTU_TARGETS_EXPORT AkantuTargets)
 endif()
 
 include(CMakeVersionGenerator)
 include(CMakePackagesSystem)
 include(CMakeFlagsHandling)
 
 include(AkantuPackagesSystem)
 include(AkantuMacros)
 include(AkantuCleaning)
 
 #cmake_activate_debug_message()
 
 #===============================================================================
 # Version Number
 #===============================================================================
 # AKANTU version number.  An even minor number corresponds to releases.
 set(AKANTU_MAJOR_VERSION 3)
-set(AKANTU_MINOR_VERSION 0)
+set(AKANTU_MINOR_VERSION 1)
 set(AKANTU_PATCH_VERSION 0)
 define_project_version()
 
 #===============================================================================
 # Options
 #===============================================================================
 # Debug
 set(CMAKE_CXX_FLAGS_RELEASE "-O3 -DNDEBUG -DAKANTU_NDEBUG"
   CACHE STRING "Flags used by the compiler during release builds" FORCE)
 
 #add_flags(cxx "-Wall -Wextra -pedantic -Werror")
 if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU" OR CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
   add_flags(cxx "-Wall -Wextra -pedantic") # -Weffc++
   set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG_INIT} -ggdb3"
     CACHE STRING "Flags used by the compiler during debug builds" FORCE)
   set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO_INIT} -ggdb3"
     CACHE STRING "Flags used by the compiler during debug builds" FORCE)
 else()
   add_flags(cxx "-Wall")
 endif()
 
 option(AKANTU_EXAMPLES "Activate examples" OFF)
 option(AKANTU_TESTS "Activate tests" OFF)
 
 set(AKANTU_PREFERRED_PYTHON_VERSION 3 CACHE STRING "Preferred version for python related things")
 mark_as_advanced(AKANTU_PREFERRED_PYTHON_VERSION)
 
 include(AkantuExtraCompilationProfiles)
 #===============================================================================
 # Dependencies
 #===============================================================================
 declare_akantu_types()
 
 package_list_packages(${PROJECT_SOURCE_DIR}/packages
   EXTRA_PACKAGES_FOLDER ${PROJECT_SOURCE_DIR}/extra_packages
   NO_AUTO_COMPILE_FLAGS)
 
 ## meta option \todo better way to do it when multiple package give enable the
 ## same feature
 if(AKANTU_SCOTCH)
   set(AKANTU_PARTITIONER ON)
 else()
   set(AKANTU_PARTITIONER OFF)
 endif()
 
 if(AKANTU_MUMPS)
   set(AKANTU_SOLVER ON)
 else()
   set(AKANTU_SOLVER OFF)
 endif()
 
 #===============================================================================
 # Akantu library
 #===============================================================================
 add_subdirectory(src)
 
 #===============================================================================
 # Documentation
 #===============================================================================
 if(AKANTU_DOCUMENTATION_DOXYGEN OR AKANTU_DOCUMENTATION_MANUAL)
   add_subdirectory(doc)
 else()
   set(AKANTU_DOC_EXCLUDE_FILES "${PROJECT_SOURCE_DIR}/doc/manual" CACHE INTERNAL "")
 endif()
 
 #===============================================================================
 # Examples and tests
 #===============================================================================
 include(AkantuTestsMacros)
 include(AkantuExampleMacros)
 
 if(AKANTU_TESTS)
   option(AKANTU_BUILD_ALL_TESTS "Build all tests" ON)
   find_package(GMSH REQUIRED)
   # package_is_activated(pybind11 _pybind11_act)
   # if(_pybind11_act)
   #   find_package(pybind11 CONFIG REQUIRED QUIET) # to get the pybind11_add_module macro
   # endif()
 endif()
 
 if(AKANTU_EXAMPLES)
   find_package(GMSH REQUIRED)
   add_subdirectory(examples)
 endif()
 
 # tests
 add_test_tree(test)
 
 #===============================================================================
 # Python interface
 #===============================================================================
 package_is_activated(python_interface _python_act)
 if(_python_act)
   if(IS_ABSOLUTE "${CMAKE_INSTALL_PREFIX}")
     set(AKANTU_PYTHON_INSTALL_PREFIX ${CMAKE_INSTALL_PREFIX})
   else()
     set(AKANTU_PYTHON_INSTALL_PREFIX "${PROJECT_BINARY_DIR}/${CMAKE_INSTALL_PREFIX}")
   endif()
   add_subdirectory(python)
 endif()
 
 #===============================================================================
 # Install and Packaging
 #===============================================================================
 include(AkantuInstall)
 
 option(AKANTU_DISABLE_CPACK
   "This option commands the generation of extra info for the \"make package\" target" ON)
 mark_as_advanced(AKANTU_DISABLE_CPACK)
 if(NOT AKANTU_DISABLE_CPACK)
   include(AkantuCPack)
 endif()
diff --git a/VERSION b/VERSION
index 4a36342fc..fd2a01863 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-3.0.0
+3.1.0