diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 7c7e0a7..3239bba 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,7 +1,7 @@
 compile_pdf:
   image: hiono/texlive
   script:
-    - apt-get install build-essential
+            - apt-get install build-essential -y --no-install-recommends
     - make
   artifacts:
     paths: