diff --git a/.gitlab/build/docker_install.sh b/.gitlab/build/docker_install.sh
index 6a41f263..df2df16c 100644
--- a/.gitlab/build/docker_install.sh
+++ b/.gitlab/build/docker_install.sh
@@ -3,3 +3,5 @@
 [[ ! -e /.dockerenv ]] && exit 0
 
 set -xe
+
+apk add parallel