diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index c3f5b851f5ddf4e64750b58793e3e3e96ac0848d..ddb7f7e46c88314c8dea1b6f1cac6f1cef54e7fb 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,4 +1,4 @@
-image: python:alpine
+image: python:3.6-buster
 
 before_script:
   - pip install mkdocs
diff --git a/README.md b/README.md
index 782dc2c0d0db6c46b05590519dd3fdf3411b33f1..fda19ac1233f1117b721870667f958556e4f94e7 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ This project's static Pages are built by [GitLab CI][ci], following the steps
 defined in [`.gitlab-ci.yml`](.gitlab-ci.yml):
 
 ```
-image: python:alpine
+image: python:3.8-buster
 
 before_script:
   - pip install mkdocs