diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0f2cf2763..676a7f2f6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,7 +11,7 @@ endif()
 project(Prerequisites LANGUAGES)
 set(ENV{PKG_CONFIG_PATH} "$ENV{PETSC_DIR}/$ENV{PETSC_ARCH}/lib/pkgconfig:$ENV{PKG_CONFIG_PATH}")
 pkg_check_modules(PETSC_MIN REQUIRED PETSc>=3.12.0 QUIET) #CMake does not support version range
-pkg_check_modules(PETSC REQUIRED PETSc<3.21.0)
+pkg_check_modules(PETSC REQUIRED PETSc<3.22.0)
 
 pkg_get_variable(CMAKE_Fortran_COMPILER PETSc fcompiler)
 pkg_get_variable(CMAKE_C_COMPILER PETSc ccompiler)
diff --git a/src/CLI.f90 b/src/CLI.f90
index 22088a3f7..f1268f87d 100644
--- a/src/CLI.f90
+++ b/src/CLI.f90
@@ -6,7 +6,7 @@
 !> @brief Parse command line interface for PETSc-based solvers
 !--------------------------------------------------------------------------------------------------
 #define PETSC_MINOR_MIN 12
-#define PETSC_MINOR_MAX 20
+#define PETSC_MINOR_MAX 21
 
 module CLI
   use, intrinsic :: ISO_fortran_env
@@ -46,11 +46,11 @@ subroutine CLI_init()
 --  UNSUPPORTED PETSc VERSION --- UNSUPPORTED PETSc VERSION --- UNSUPPORTED PETSc VERSION ---
 #endif
 #if    PETSC_VERSION_MAJOR==3 && PETSC_VERSION_MINOR==18
-  character(len=*), parameter :: PETSc_DOI = '10.2172/1893326'
+#define PETSC_DOI '10.2172/1893326'
 #elif  PETSC_VERSION_MAJOR==3 && PETSC_VERSION_MINOR==19
-  character(len=*), parameter :: PETSc_DOI = '10.2172/1968587'
+#define PETSC_DOI '10.2172/1968587'
 #elif  PETSC_VERSION_MAJOR==3 && PETSC_VERSION_MINOR==20
-  character(len=*), parameter :: PETSc_DOI = '10.2172/2205494'
+#define PETSC_DOI '10.2172/2205494'
 #endif
   character(len=:), allocatable :: &
     commandLine, &                                                                                  !< command line call as string
@@ -65,7 +65,9 @@ subroutine CLI_init()
     i, s
   integer, dimension(8) :: &
     dateAndTime
-
+#ifdef PETSC_DOI
+  character(len=*), parameter :: PETSc_DOI = PETSC_DOI
+#endif
 
   workingDirArg = getCWD()
 
@@ -97,7 +99,9 @@ subroutine CLI_init()
   print'(1x,a)', 'https://doi.org/10.1016/j.commatsci.2018.04.030'//IO_EOL
 #if PETSC_VERSION_MAJOR==3 && PETSC_VERSION_MINOR>=18
   print'(1x,a,i0,a,i0)', 'S. Balay et al., PETSc/TAO User Manual Revision ',PETSC_VERSION_MAJOR,'.',PETSC_VERSION_MINOR
+#ifdef PETSC_DOI
   print'(1x,a)', 'https://doi.org/'//PETSc_DOI
+#endif
 #endif
   print'(/,1x,a)', 'Version: '//DAMASKVERSION