diff --git a/opennms-container/horizon/Dockerfile b/opennms-container/horizon/Dockerfile
index 10f818e38314..58ed08bf1d9e 100644
--- a/opennms-container/horizon/Dockerfile
+++ b/opennms-container/horizon/Dockerfile
@@ -26,8 +26,8 @@ RUN curl --retry 5 --fail -L ${CONFD_URL} -o /usr/bin/confd && \
     chmod +x /usr/bin/confd
 
 # Given that CentOS mirrors are offline we will point to Vault
-#RUN sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-*
-#RUN sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*
+RUN sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-*
+RUN sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*
 
 RUN dnf -y install dnf-plugins-core && \
     dnf config-manager --set-enabled powertools && \
diff --git a/opennms-container/sentinel/Dockerfile b/opennms-container/sentinel/Dockerfile
index 55efa3439a23..6ff93aaed461 100644
--- a/opennms-container/sentinel/Dockerfile
+++ b/opennms-container/sentinel/Dockerfile
@@ -18,8 +18,8 @@ ARG REPO_RPM="https://yum.opennms.org/repofiles/opennms-repo-stable-rhel8.noarch
 SHELL ["/bin/bash", "-c"]
 
 # Given that CentOS mirrors are offline we will point to Vault
-#RUN sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-*
-#RUN sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*
+RUN sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-*
+RUN sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*
 
 # Collect generic steps in a layer for caching
 RUN rpm --import "${REPO_KEY_URL}" && \