diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index ea2c12a8d1d08da8e2fc4101a0b98f2607c63e55..1735c7adda1c65ce9f1675419e6bfabbfe5e2acc 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -67,6 +67,7 @@ package-debian-job:
     - mkdir -p ${DEB_BUILD_PROFILE_DIR}
     - cp -a SLUB_*.xml "${DEB_BUILD_PROFILE_DIR}/"
     - cp -a build/SLUB_*.xml "${DEB_BUILD_PROFILE_DIR}/"
+    - chmod -R u-w,g-w,o-w "${DEB_BUILD_PROFILE_DIR}/"
     # copy & rename deb control file template
     - cp gitlab-ci/slubarchiv-mediaconch-profiles.control "${DEB_BUILD_DIR}/DEBIAN/control"
     # set package version