diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 62b6bc13409417cd09d28b68cd09a0cf55219433..b26b177f3b577506bf538e8630fc9c073190b2a2 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -522,7 +522,7 @@ docs-registry:
     refs:
       - /^release-.*/
   script:
-    - apk add sed
+    - apt-get update && apt-get install -y sed
     - pip install -r ./requirements.txt
     - find ./docs -type f -exec sed -i -e "s/__APP_VERSION__/${APP_VERSION}/g" {} \;
     - python3 .docs/docker/release.py