diff --git a/ci/make-git-snapshot.sh b/ci/make-git-snapshot.sh
index 1b17b93f..acfdd6c2 100755
--- a/ci/make-git-snapshot.sh
+++ b/ci/make-git-snapshot.sh
@@ -26,3 +26,4 @@ ls -al ${TARFILE_TMP}
     rm submodule.tar
 done
 mv ${TARFILE_TMP} ${TARFILE}
+xz "${TARFILE}"