prerequisites.md

@@ -3,14 +3,14 @@
 * To compile you need:
    * A Fortran compiler (GNU>=4.5 or PGI)
    * Lapack library
-   * CMake
+   * CMake (>=3.16)
    * Swig
    * Python (>=3 and above is better) and Numpy
    * (optional) HDF5 library with Fortran support (>=1.10)
 * Optionnal but recommended package for use of pre-processor:
    * Scipy python module
 * For visualization:
-  * Python VTK module (VTK >= 6 is better)
+  * Python VTK module (VTK >= 7, 9 is better)
   * Paraview
 * To build the sphinx documentation:
   * Latex distribution (with pdflatex utility)