diff --git a/configure b/configure
index 63a041fa..391f5384 100755
--- a/configure
+++ b/configure
@@ -319,8 +319,8 @@ EOF
                 rm ${QP_ROOT}/external/opam_installer.sh
 #                source ${OPAMROOT}/opam-init/init.sh > /dev/null 2> /dev/null || true
 #
-#                opam switch create ocaml-base-compiler.4.10.0
-                opam init --verbose --yes --compiler=4.10.0 --disable-sandboxing
+#                opam switch create ocaml-base-compiler.4.11.1
+                opam init --verbose --yes --compiler=4.11.1 --disable-sandboxing
 
                 eval $(opam env)
                 opam install -y ${OCAML_PACKAGES}  || exit 1
@@ -339,9 +339,9 @@ EOF
 EOF
                 rm ${QP_ROOT}/external/opam_installer.sh
 #                source ${OPAMROOT}/opam-init/init.sh > /dev/null 2> /dev/null || true
-#                opam switch create ocaml-base-compiler.4.10.0     || exit 1
+#                opam switch create ocaml-base-compiler.4.11.1     || exit 1
 
-                opam init --verbose --yes --compiler=4.10.0 --disable-sandboxing
+                opam init --verbose --yes --compiler=4.11.1 --disable-sandboxing
                 eval $(opam env)
                 execute << EOF
                   opam install -y \${OCAML_PACKAGES}  || exit 1