diff --git a/keystone-oidc/Dockerfile b/keystone-oidc/Dockerfile
index 50a982c..b4a4c30 100644
--- a/keystone-oidc/Dockerfile
+++ b/keystone-oidc/Dockerfile
@@ -1,4 +1,4 @@
 FROM docker.io/openstackhelm/keystone:2024.1-ubuntu_jammy
 
-RUN apt-get -y update && apt-get install -y libapache2-mod-auth-openidc curl
+RUN apt-get -y update && apt-get install -y libapache2-mod-auth-openidc curl ca-certificates
 RUN update-ca-certificates