diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 3f33084..8b5c645 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -2,7 +2,7 @@ pages:
   script:
   - mkdir -p docs
   - cd docs
-  - apt install doxygen texlive-base texlive-latex-extra texlive-fonts-extra texlive-fonts-recommended python3-pip
+  - apt install doxygen texlive-base texlive-latex-extra texlive-fonts-extra texlive-fonts-recommended graphviz -y
   - doxygen ./Doxyfile
   - cd ./latex
   - make