title: How do I enable syntax highlighting for Fortran in GitBook
body: <h3>Original Question:</h3>
  
  <p>I can't find how to activate syntax highlighting on GitBook!
  It works perfectly when I look at the <code>.md</code> files on GitHub where my repository is hosted, by not when I look at my rendered gitbook on the web.
  Any ideas? Thanks</p>
  
  <h3>Edit:</h3>
  
  <p>it works for bash, Python, C, C++, javascript, etc, but not for Fortran! It seems that gitbook and github don't use the same syntax highlighting package.
  Is there a way to activate syntax highlighting with Fortran on GitBook?</p>
  
  <h3>Sample code:</h3>
  
  <pre><code>``` fortran
  program compute_t
      implicit none
  
      integer :: d1, d2, d3, d4 d5  ! Input data
      integer :: u1, u2, v, w, t    ! Computed entities
  
      call read_data(d1,d2,d3,d4,d5)
  
      call compute_u(d1,d2,u1)
      call compute_u(d3,d4,u2)
      call compute_w(d5,w)
      call compute_v(u2,w,v)
      call compute_t(u1,v,t)
  
      write(*,*), "t=", t
  
  end program
  ```
  </code></pre>