diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 2a1cdb21..4c84edb9 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -115,8 +115,8 @@ build-developers-doc:
     - cd ../../src
     - python3 -m venv doc-venv
     - . doc-venv/bin/activate
-    - pip3 install -U -r ../requirements.txt
-    - pip3 install -U pdoc3
+    - pip3 install -r ../requirements.txt
+    - pip3 install pdoc3
     - pdoc --html .
     # Create archive
     - tar cf html.tar ./html