diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index acaad11fe85844f5f425b35072fe9534f3469d98..7e022d1600c0db06aed94b94f14bced56a56f39e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -275,7 +275,7 @@ sync-gitlab-spack-instance:
   image: $BUILD_ENV_DOCKER_IMAGE
   variables:
     SPACK_REPO_PATH: $SPACK_PATH_GITLAB/ebrains-spack-builds
-    SPACK_JOBS: 4
+    SPACK_JOBS: 16
     OCI_CACHE_PREFIX: ""
     UPDATE_SPACK_OCI_CACHES: false
   script: