-Build-Depends: debhelper (>> 4.0.0), ocaml-3.06, ocaml-findlib, libpcre-ocaml-dev, libocamlnet-ocaml-dev
-Standards-Version: 3.5.7
+Build-Depends: debhelper (>> 4.0.0), ocaml-3.07, ocaml-findlib, libpcre-ocaml-dev (>= 4.30.0), libocamlnet-ocaml-dev (>= 0.94), graphviz
+Standards-Version: 3.6.1.0