diff --git a/code/DAMASK_spectral_driver.f90 b/code/DAMASK_spectral_driver.f90
index c01a806a0..49ad3e9ca 100644
--- a/code/DAMASK_spectral_driver.f90
+++ b/code/DAMASK_spectral_driver.f90
@@ -84,7 +84,7 @@ program DAMASK_spectral_Driver
 
  implicit none
 
-#include <petsc-finclude/petscsys.h>
+#include <petsc/finclude/petscsys.h>
 
 !--------------------------------------------------------------------------------------------------
 ! variables related to information from load case and geom file
diff --git a/code/DAMASK_spectral_interface.f90 b/code/DAMASK_spectral_interface.f90
index 3f9c795fa..8b5ef3dbb 100644
--- a/code/DAMASK_spectral_interface.f90
+++ b/code/DAMASK_spectral_interface.f90
@@ -17,7 +17,7 @@ module DAMASK_interface
  implicit none
  private
 #ifdef PETSc
-#include <petsc-finclude/petscsys.h>
+#include <petsc/finclude/petscsys.h>
 #endif
  logical,             public, protected :: appendToOutFile = .false.                                !< Append to existing spectralOut file (in case of restart, not in case of regridding)
  integer(pInt),       public, protected :: spectralRestartInc = 1_pInt                              !< Increment at which calculation starts
diff --git a/code/DAMASK_spectral_solverAL.f90 b/code/DAMASK_spectral_solverAL.f90
index dcd674cb0..6eea15bd9 100644
--- a/code/DAMASK_spectral_solverAL.f90
+++ b/code/DAMASK_spectral_solverAL.f90
@@ -18,7 +18,7 @@ module DAMASK_spectral_solverAL
  
  implicit none
  private
-#include <petsc-finclude/petsc.h90>
+#include <petsc/finclude/petsc.h90>
 
  character (len=*), parameter, public :: &
    DAMASK_spectral_solverAL_label = 'al'
diff --git a/code/DAMASK_spectral_solverBasicPETSc.f90 b/code/DAMASK_spectral_solverBasicPETSc.f90
index 39f6493a6..5651ff00e 100644
--- a/code/DAMASK_spectral_solverBasicPETSc.f90
+++ b/code/DAMASK_spectral_solverBasicPETSc.f90
@@ -18,7 +18,7 @@ module DAMASK_spectral_SolverBasicPETSc
 
  implicit none
  private
-#include <petsc-finclude/petsc.h90>
+#include <petsc/finclude/petsc.h90>
 
  character (len=*), parameter, public :: &
    DAMASK_spectral_SolverBasicPETSC_label = 'basicpetsc'
diff --git a/code/DAMASK_spectral_solverPolarisation.f90 b/code/DAMASK_spectral_solverPolarisation.f90
index c07c51190..4ae57842c 100644
--- a/code/DAMASK_spectral_solverPolarisation.f90
+++ b/code/DAMASK_spectral_solverPolarisation.f90
@@ -18,7 +18,7 @@ module DAMASK_spectral_solverPolarisation
  
  implicit none
  private
-#include <petsc-finclude/petsc.h90>
+#include <petsc/finclude/petsc.h90>
 
  character (len=*), parameter, public :: &
    DAMASK_spectral_solverPolarisation_label = 'polarisation'
diff --git a/code/DAMASK_spectral_utilities.f90 b/code/DAMASK_spectral_utilities.f90
index 851203d19..a399736f0 100644
--- a/code/DAMASK_spectral_utilities.f90
+++ b/code/DAMASK_spectral_utilities.f90
@@ -17,7 +17,7 @@ module DAMASK_spectral_utilities
  implicit none
  private
 #ifdef PETSc
-#include <petsc-finclude/petscsys.h>
+#include <petsc/finclude/petscsys.h>
 #endif
  include 'fftw3-mpi.f03'
  
diff --git a/code/IO.f90 b/code/IO.f90
index 78a3d2b60..0da82adc6 100644
--- a/code/IO.f90
+++ b/code/IO.f90
@@ -102,7 +102,7 @@ subroutine IO_init
  implicit none
  integer(pInt) :: worldrank = 0_pInt
 #ifdef PETSc
-#include <petsc-finclude/petscsys.h>
+#include <petsc/finclude/petscsys.h>
  PetscErrorCode :: ierr
 #endif
  external :: &
diff --git a/code/Makefile b/code/Makefile
index dd5793a8c..26658ca1c 100644
--- a/code/Makefile
+++ b/code/Makefile
@@ -17,7 +17,7 @@ SHELL = /bin/sh
 # STANDARD_CHECK = checking for Fortran 2008, compiler dependend
 ########################################################################################
 
-include $(PETSC_DIR)/lib/petsc-conf/variables
+include $(PETSC_DIR)/lib/petsc/conf/variables
 INCLUDE_DIRS := $(PETSC_FC_INCLUDES) -DPETSc -I../lib
 LIBRARIES    := $(PETSC_WITH_EXTERNAL_LIB)
 COMPILERNAME ?= $(FC)
diff --git a/code/mesh.f90 b/code/mesh.f90
index 4a6f791d7..925452285 100644
--- a/code/mesh.f90
+++ b/code/mesh.f90
@@ -117,7 +117,7 @@ module mesh
 
 #ifdef Spectral
 #ifdef PETSc
-#include <petsc-finclude/petscsys.h>
+#include <petsc/finclude/petscsys.h>
  include 'fftw3-mpi.f03'
 #else
  include 'fftw3.f03'
diff --git a/code/numerics.f90 b/code/numerics.f90
index ac98d1761..e935e63a8 100644
--- a/code/numerics.f90
+++ b/code/numerics.f90
@@ -13,7 +13,7 @@ module numerics
  implicit none
  private
 #ifdef PETSc
-#include <petsc-finclude/petsc.h90>
+#include <petsc/finclude/petsc.h90>
 #endif
  character(len=64), parameter, private :: &
    numerics_CONFIGFILE        = 'numerics.config'                                                   !< name of configuration file
diff --git a/code/prec.f90 b/code/prec.f90
index fac90015b..02ef627bb 100644
--- a/code/prec.f90
+++ b/code/prec.f90
@@ -141,7 +141,7 @@ subroutine prec_init
  implicit none
  integer(pInt) :: worldrank = 0_pInt
 #ifdef PETSc
-#include <petsc-finclude/petscsys.h>
+#include <petsc/finclude/petscsys.h>
  PetscErrorCode :: ierr
 #endif
  external :: &
diff --git a/code/spectral_damage.f90 b/code/spectral_damage.f90
index 851571186..6e90e6aaf 100644
--- a/code/spectral_damage.f90
+++ b/code/spectral_damage.f90
@@ -20,7 +20,7 @@ module spectral_damage
 
  implicit none
  private
-#include <petsc-finclude/petsc.h90>
+#include <petsc/finclude/petsc.h90>
 
  character (len=*), parameter, public :: &
    spectral_damage_label = 'spectraldamage'
diff --git a/code/spectral_thermal.f90 b/code/spectral_thermal.f90
index d9e06c834..59df82baa 100644
--- a/code/spectral_thermal.f90
+++ b/code/spectral_thermal.f90
@@ -20,7 +20,7 @@ module spectral_thermal
 
  implicit none
  private
-#include <petsc-finclude/petsc.h90>
+#include <petsc/finclude/petsc.h90>
 
  character (len=*), parameter, public :: &
    spectral_thermal_label = 'spectralthermal'