diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 14090196b05acf030900b699d77bf66b7f8c83eb..ad76e3a01ac2d7829024ed26582e454d213becbe 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,6 +1,6 @@
 before_script:
 - apt-get update
-- apt-get install virtualenv python3 build-essential
+- apt-get install -y virtualenv python3 build-essential
 - virtualenv -p /usr/bin/python3 python3
 - . ~/python3/bin/activate
 - pip install mock