diff --git a/container-toolkit/install-guide.md b/container-toolkit/install-guide.md
index cc7edb54d..3a4e474a1 100644
--- a/container-toolkit/install-guide.md
+++ b/container-toolkit/install-guide.md
@@ -34,6 +34,7 @@ where `systemd` cgroup drivers are used that cause containers to lose access to
 1. Install the prerequisites for the instructions below:
    ```console
    $ sudo apt-get update && sudo apt-get install -y --no-install-recommends \
+      ca-certificates \
       curl \
       gnupg2
    ```