diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 59a5aa0..9c00206 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -5,6 +5,15 @@ Change Log
 Notable project changes in various releases.
 
 
+1.1
+===
+
+Added
+-----
+
+* Method 'free' implemented to release the MPI-communicator
+
+
 1.0
 ===
 
diff --git a/CMakeLists.txt b/CMakeLists.txt
index a9581ff..8de8fc7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,7 +7,7 @@ include(MpiFxUtils)
 
 include(${CMAKE_CURRENT_SOURCE_DIR}/config.cmake)
 
-project(MpiFx VERSION 1.0 LANGUAGES Fortran)
+project(MpiFx VERSION 1.1 LANGUAGES Fortran)
 
 setup_build_type()
 
diff --git a/doc/doxygen/Doxyfile b/doc/doxygen/Doxyfile
index cf3eac9..045fac5 100644
--- a/doc/doxygen/Doxyfile
+++ b/doc/doxygen/Doxyfile
@@ -32,7 +32,7 @@ PROJECT_NAME           = "MpiFx"
 # This could be handy for archiving the generated documentation or
 # if some version control system is used.
 
-PROJECT_NUMBER = "1.0"
+PROJECT_NUMBER = "1.1"
 
 # 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
diff --git a/doc/sphinx/conf.py b/doc/sphinx/conf.py
index e73f6ff..35addeb 100644
--- a/doc/sphinx/conf.py
+++ b/doc/sphinx/conf.py
@@ -45,10 +45,10 @@
 # built documents.
 #
 # The short X.Y version.
-version = '1.0'
+version = '1.1'
 
 # The full version, including alpha/beta/rc tags.
-release = '1.0'
+release = '1.1'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/lib/mpifx.fypp b/lib/mpifx.fypp
index 68e76bb..8aa702c 100644
--- a/lib/mpifx.fypp
+++ b/lib/mpifx.fypp
@@ -39,7 +39,7 @@
 #:set MAX_RANK = getvar('MAX_RANK', 6)
 
 
-#! Returns colons within paranthesis according to the RANK or empty string
+#! Returns colons within parenthesis according to the RANK or empty string
 #! if RANK is zero.
 #:def RANKSUFFIX(RANK)
 ${'' if RANK == 0 else '(' + ':' + ',:' * (RANK - 1) +')'}$
diff --git a/lib/mpifx_comm.fpp b/lib/mpifx_comm.fpp
index fa99e76..9c4b039 100644
--- a/lib/mpifx_comm.fpp
+++ b/lib/mpifx_comm.fpp
@@ -1,6 +1,6 @@
 !> Contains the extended MPI communicator.
 module mpifx_comm_module
-  use mpi
+  use mpi, only : MPI_COMM_WORLD, mpi_comm_size, mpi_comm_rank, mpi_comm_split, mpi_comm_free
   use mpifx_helper_module
   implicit none
   private
@@ -21,6 +21,9 @@ module mpifx_comm_module
     !> Creates a new communicator by splitting the old one.
     procedure :: split => mpifx_comm_split
 
+    !> Frees the communicator. The communicator should not be used after this.
+    procedure :: free => mpifx_comm_free
+
   end type mpifx_comm
 
 contains
@@ -52,7 +55,7 @@ contains
     end if
     self%leadrank = 0
     self%lead = (self%rank == self%leadrank)
-    
+
   end subroutine mpifx_comm_init
 
 
@@ -73,10 +76,10 @@ contains
   !!     program test_split
   !!       use libmpifx_module
   !!       implicit none
-  !!     
+  !!
   !!       type(mpifx_comm) :: allproc, groupproc
   !!       integer :: groupsize, mygroup
-  !!     
+  !!
   !!       call mpifx_init()
   !!       call allproc%init()
   !!       groupsize = allproc%size / 2
@@ -85,9 +88,9 @@ contains
   !!       write(*, "(3(A,1X,I0,1X))") "ID:", allproc%rank, "SUBGROUP", &
   !!           & mygroup, "SUBGROUP ID", groupproc%rank
   !!       call mpifx_finalize()
-  !!       
+  !!
   !!     end program test_split
-  !!       
+  !!
   !! \see MPI documentation (\c MPI_COMM_SPLIT)
   !!
   subroutine mpifx_comm_split(self, splitkey, rankkey, newcomm, error)
@@ -97,7 +100,7 @@ contains
     integer, intent(out), optional :: error
 
     integer :: error0, newcommid
-    
+
     call mpi_comm_split(self%id, splitkey, rankkey, newcommid, error0)
     call handle_errorflag(error0, "mpi_comm_split() in mpifx_comm_split()", error)
     if (error0 /= 0) then
@@ -106,6 +109,22 @@ contains
     call newcomm%init(newcommid, error)
 
   end subroutine mpifx_comm_split
-    
-  
+
+
+  !> Frees the MPI communicator.
+  !>
+  !> After this call, the passed communicator should not be used any more.
+  !>
+  !> \param self  Communicator instance.
+  !>
+  subroutine mpifx_comm_free(self)
+    class(mpifx_comm), intent(inout) :: self
+
+    integer :: error
+
+    call mpi_comm_free(self%id, error)
+
+  end subroutine mpifx_comm_free
+
+
 end module mpifx_comm_module