diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 102934e1cf299c2f4891276a9a209f41882503b6..8116457440dcc6201fffc881c235928a53fd0648 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -11,8 +11,8 @@ build:
     - opam repo add verimag-sync-repo "http://www-verimag.imag.fr/DIST-TOOLS/SYNCHRONE/opam-repository"
     - eval `opam config env`
     - sudo apt-get update
-    - opam depext -y lustre-v6 lutin lablgtk3
-    - opam install -y dune ocamlgraph lutin lablgtk3
+    - opam depext -y lustre-v6 lutin lablgtk3 functory
+    - opam install -y dune ocamlgraph lutin lablgtk3 functory
     - make
     - make install
     - make test