diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index c92811a9e848abc78de08eaba9b633b64435ff8e..7f8ccfb8a56071ca2c61f0ad7a623a49ef53615c 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -116,6 +116,7 @@ trigger-cache-purge:
     include: purge-cache.gitlab-ci.yml
   variables:
     PARENT_PIPELINE_ID: $CI_PIPELINE_ID
+    CF_PURGE_CACHE_CHUNK_SIZE: 20
 
 
 # vi: set ts=2 sw=2 et ft=yaml: