diff --git a/Dockerfile b/Dockerfile
index 04344be..135655a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,7 +7,7 @@ FROM tier/shibboleth_sp:3.3.0_12022021
 MAINTAINER info@evolveum.com
 
 RUN rpm --import http://repos.azulsystems.com/RPM-GPG-KEY-azulsystems
-RUN curl -o /etc/yum.repos.d/zulu.repo http://repos.azulsystems.com/rhel/zulu.repo
+RUN curl -o /etc/yum.repos.d/zulu.repo https://repos.azulsystems.com/rhel/zulu.repo
 RUN yum -y update
 RUN yum -y install \
  	zulu-11 \