diff --git a/CMakeLists.txt b/CMakeLists.txt
index 115c4200..a596fa88 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.12)
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON )
 
-project(sloth VERSION 2.0 LANGUAGES CXX)
+project(sloth VERSION 2.1 LANGUAGES CXX)
 
 list(APPEND CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake/modules)
 
diff --git a/doc/Doxyfile.cmake b/doc/Doxyfile.cmake
index 9165500e..a42ae205 100644
--- a/doc/Doxyfile.cmake
+++ b/doc/Doxyfile.cmake
@@ -36,7 +36,7 @@ PROJECT_NAME= SLOTH
 # The PROJECT_NUMBER tag can be used to enter a project or revision number. This
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
-PROJECT_NUMBER= "v2.0.0"
+PROJECT_NUMBER= "v2.1.0"
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
diff --git a/spack_repo/packages/sloth/package.py b/spack_repo/packages/sloth/package.py
index 9fdb74b8..d27b7bba 100644
--- a/spack_repo/packages/sloth/package.py
+++ b/spack_repo/packages/sloth/package.py
@@ -15,7 +15,9 @@ class Sloth(CMakePackage):
     homepage = "https://github.com/Collab4Sloth/SLOTH"
     url      = "https://github.com/Collab4Sloth/SLOTH.git"
 
-    version("2.0.0",  tag='v2.0.0', preferred=True)
+    version("2.1.0",  tag='v2.1.0', preferred=True)
+    version("2.0.1",  tag='v2.0.1', preferred=False)
+    version("2.0.0",  tag='v2.0.0', preferred=False)
     version("master", git='https://github.com/Collab4Sloth/SLOTH.git', branch='master')
 
     variant('petsc'       , default=False  , description='Enable PETSc solvers, preconditioners, etc.')