diff --git a/tasks/setup-Debian.yml b/tasks/setup-Debian.yml
index cc444ca..2dd2b34 100644
--- a/tasks/setup-Debian.yml
+++ b/tasks/setup-Debian.yml
@@ -39,6 +39,7 @@
 
 - name: Add Docker apt key (alternative for older systems without SNI).
   shell: >
+    set -e -o pipefail
     curl -sSL {{ docker_apt_gpg_key }} | apt-key add -
   args:
     warn: false