diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 2826e04e0d63d3dfa617e11a1a88eb55941bba7c..75d7aa959c3147e0b2970413d20b10b527ba1676 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -79,7 +79,7 @@ unit-test-job:   # This job runs in the test stage.
 pages:
   stage: deploy
   script:
-  - sudo apt install graphviz
+  - apt-get install graphviz
   - pip install -U sphinx m2r2 furo graphviz pyUML pydot gprof2dot
   - pip install -e .
   - mkdir public