diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index c94e2e8..3fbc88a 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,8 +1,9 @@
-image: python:3.8-alpine
+image: python:3.8-bullseye
 
 test:
   stage: test
   script:
+  - sudo apt install build-essential
   - pip install -r requirements.txt
   - pip install -U sphinx sphinx-press-theme
   - sphinx-build -b html docs public
@@ -12,6 +13,7 @@ test:
 pages:
   stage: deploy
   script:
+  - sudo apt install build-essential
   - pip install -r requirements.txt
   - pip install -U sphinx sphinx-press-theme
   - sphinx-build -b html docs public