diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 02f67f4..7c7e0a7 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,6 +1,7 @@
 compile_pdf:
   image: hiono/texlive
   script:
+    - apt-get install build-essential
     - make
   artifacts:
     paths: