diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index e909be7e3..aa0d1dd80 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -163,7 +163,7 @@ run-experiment:
   stage: build
   script:
     - apt-get update
-    - apt-get upgrade
+    - apt-get upgrade -y
     # Grab analysis and representation tools
     - apt-get install -y openjdk-8-jre-headless default-jre-headless ca-certificates-java
     - apt-get install -y octave