diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index ee743f7..4385ad1 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,6 +1,7 @@
 image: python:3.11-slim
 
 before_script:
+  - time apt-key adv --recv-keys --keyserver keyserver.ubuntu.com *
   - time apt update
   - time pip install -r requirements.txt
   - time cd mdocotion && python setup.py install && cd ..