diff --git a/CMakeLists.txt b/CMakeLists.txt
index 75c35ef..373559f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,8 +1,8 @@
-cmake_minimum_required(VERSION 3.8)
+cmake_minimum_required(VERSION 3.10)
 
 # set the project name
 set(CMAKE_PROJECT_NAME "SurfATT")
-project(${CMAKE_PROJECT_NAME} VERSION 1.5.0 LANGUAGES Fortran CXX)
+project(${CMAKE_PROJECT_NAME} VERSION 1.5.1 LANGUAGES Fortran CXX)
 
 # set the version number and git commit hash
 execute_process(
@@ -12,8 +12,6 @@ execute_process(
     OUTPUT_STRIP_TRAILING_WHITESPACE
 )
 
-message(${GIT_COMMIT_HASH})
-
 configure_file(
   ${PROJECT_SOURCE_DIR}/include/version.h.in
   ${PROJECT_SOURCE_DIR}/include/version.h
diff --git a/examples/04_hawaii_topo/run_this_example.sh b/examples/04_hawaii_topo/run_this_example.sh
index fc89752..0861a2e 100644
--- a/examples/04_hawaii_topo/run_this_example.sh
+++ b/examples/04_hawaii_topo/run_this_example.sh
@@ -17,5 +17,8 @@ gmt grdcut @earth_relief_01m -R-157/-152/18/21 -Ghawaii.nc
 # inversion 
 mpirun -np $NPROC ../../bin/surfatt_tomo -i input_params.yml
 
+# rotate initial model
+../../bin/surfatt_rotate_model -i OUTPUT_FILES/model_iter.h5 -a `echo $angle | awk '{print -$1}'` -c $pos_str -o OUTPUT_FILES/initial_model.csv -k vs_000
+
 # rotate back to original position
 ../../bin/surfatt_rotate_model -i OUTPUT_FILES/final_model.h5 -a `echo $angle | awk '{print -$1}'` -c $pos_str -o OUTPUT_FILES/final_model.csv
\ No newline at end of file
diff --git a/src/shared/argparse.f90 b/src/shared/argparse.f90
index 368d7db..ad2e842 100644
--- a/src/shared/argparse.f90
+++ b/src/shared/argparse.f90
@@ -249,14 +249,15 @@ subroutine argparse_rotate_topo(fname, xrange, yrange, angle, center, outfname)
 
   end subroutine argparse_rotate_topo
 
-  subroutine argparse_rotate_model(fname, angle, center, outfname)
+  subroutine argparse_rotate_model(fname, angle, center, outfname, keyname)
     use ieee_arithmetic
     character(len=MAX_STRING_LEN),dimension(:), allocatable :: args
     character(len=MAX_STRING_LEN) :: arg, value
     character(len=MAX_STRING_LEN),intent(out) :: fname, outfname
+    character(len=MAX_NAME_LEN),intent(out) :: keyname
     real(kind=dp), intent(out) :: angle, center(2)
     real(kind=dp) :: nan
-    integer :: i,nargs,m,ier,nopt=4
+    integer :: i,nargs,m,ier,nopt=5
 
     nargs = command_argument_count()
     allocate(args(nargs))
@@ -266,6 +267,7 @@ subroutine argparse_rotate_model(fname, angle, center, outfname)
     angle = 0.
     nan = ieee_value(nan, ieee_quiet_nan)
     center = [nan, nan]
+    keyname = 'vs'
     if (nargs==0 .or. any(args == '-h')) then
       write(*,*)'Usage: surfatt_rotate_model -i model_file -a angle -c clat/clon -o out_model_file' // &
                 ' [-h]'
@@ -282,6 +284,7 @@ subroutine argparse_rotate_model(fname, angle, center, outfname)
       write(*,*)' -a angle             Angle in degree to rotate model'
       write(*,*)' -c clat/clon         Center of rotation in latitude and longitude'
       write(*,*)' -h                   Print help message'
+      write(*,*)' -k keyname           Key name of the variable to rotate, defaults to "vs"'
     endif
     m = 0
     do i = 1, nargs
@@ -301,6 +304,9 @@ subroutine argparse_rotate_model(fname, angle, center, outfname)
       elseif (arg(1:2) == '-o') then
         m = m+1
         outfname = args(i+1)
+      elseif (arg(1:2) == '-k') then
+        m = m+1
+        keyname = args(i+1)
       endif
     enddo
     if (m<1) then
diff --git a/src/surfatt_rotate_model.f90 b/src/surfatt_rotate_model.f90
index d332c9d..d3a7973 100644
--- a/src/surfatt_rotate_model.f90
+++ b/src/surfatt_rotate_model.f90
@@ -22,6 +22,7 @@ program rotate_model
   implicit none
   
   character(len=MAX_STRING_LEN) :: input_file, output_file
+  character(len=MAX_NAME_LEN) :: keyname
   real(kind=dp) :: angle, center(2)
   real(kind=dp), dimension(:), allocatable :: lon, lat, dep, new_lat, new_lon
   real(kind=dp), dimension(:,:,:), allocatable :: vs3d
@@ -31,14 +32,14 @@ program rotate_model
   logical :: status_ok
   integer :: i, j, k, nx, ny, nz
 
-  call argparse_rotate_model(input_file, angle, center, output_file)
+  call argparse_rotate_model(input_file, angle, center, output_file, keyname)
 
   ! Read the input file
   call hf%open(input_file)
   call hf%get('/lon', lon)
   call hf%get('/lat', lat)
   call hf%get('/dep', dep)
-  call hf%get('/vs', vs3d)
+  call hf%get('/'//trim(keyname), vs3d)
   call hf%close()
   vs3d = transpose_3(vs3d)