diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 7518792..7c13d35 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -3,7 +3,7 @@ image: ubuntu
 pages:
   script:
   - cd doxygen/
-  - apt install doxygen texlive-base texlive-latex-extra texlive-fonts-extra texlive-fonts-recommended python3-pip
+  - apt update && apt install -y doxygen texlive-base texlive-latex-extra texlive-fonts-extra texlive-fonts-recommended python3-pip
   - git clone git://github.com/mosra/m.css
   - pip3 install jinja2 Pygments
   - ./m.css/documentation/doxygen.py ./Doxyfile-mcss