diff --git a/.ci/ubuntu_setup_docker.sh b/.ci/ubuntu_setup_docker.sh
index 28f9e0d..4aa1ac8 100644
--- a/.ci/ubuntu_setup_docker.sh
+++ b/.ci/ubuntu_setup_docker.sh
@@ -1,3 +1,5 @@
+export DEBIAN_FRONTEND=noninteractive
+
 # Add Docker's official GPG key:
 sudo apt-get update
 sudo apt-get install -y ca-certificates curl