diff --git a/install/scripts/install_ocaml.sh b/install/scripts/install_ocaml.sh
index 5ce0d8c..84cef7c 100755
--- a/install/scripts/install_ocaml.sh
+++ b/install/scripts/install_ocaml.sh
@@ -4,7 +4,7 @@ set -u
 set -e
 
 cd .. ; QMCCHEM_PATH="$PWD" ; cd -
-PACKAGES="cryptokit ocamlfind sexplib.v0.11.0 ppx_sexp_conv ppx_deriving"
+PACKAGES="cryptokit ocamlbuild getopt ocamlfind sexplib.v0.11.0 ppx_sexp_conv ppx_deriving"
 
 # return 0 if program version is equal or greater than check version
 check_version () {
@@ -82,7 +82,7 @@ then
 fi
 
 source ${OPAMROOT}/opam-init/init.sh > /dev/null 2> /dev/null || true
-${QMCCHEM_PATH}/bin/opam init --verbose --yes --comp=4.07.1 --disable-sandboxing
+${QMCCHEM_PATH}/bin/opam init --verbose --yes --comp=4.10.1 --disable-sandboxing
 touch "${QMCCHEM_PATH}"/bin/opam
 eval $(${QMCCHEM_PATH}/bin/opam env)