diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 3fc489ce2b389eab6c3343c213a394fcbeb38122..67dc8beacb402312df14670c842e66cc70a838e0 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -623,5 +623,5 @@ clean_unstable_mr:
           fi ;
         fi ;
       done
-    - docker system prune --force
+    - docker system prune --filter until=144h --force
     - docker images