diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index ddc23819ca2c4ca5d29641058ec8ff236048678d..5f1cda496776d14bd6e53a7372e99d87ea989cd9 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -15,7 +15,7 @@ build_and_test:
   script:
     - sudo apt-get install -y m4
     - opam update
-    - opam install dune ocamlfind num
+    - opam install dune ocamlfind num camlp-streams
     - make
     - make install
     - cd test