diff --git a/docker/base/grafana.repo b/docker/base/grafana.repo
index b21cd166b0..dc8d30b445 100644
--- a/docker/base/grafana.repo
+++ b/docker/base/grafana.repo
@@ -3,6 +3,5 @@ name=grafana
 baseurl=https://packagecloud.io/grafana/stable/el/7/$basearch
 repo_gpgcheck=1
 enabled=1
-# TODO(jeffrey4l), enable gpg check when grafana gpgkey is OK.
-gpgcheck=0
+gpgcheck=1
 gpgkey=https://packagecloud.io/gpg.key https://grafanarel.s3.amazonaws.com/RPM-GPG-KEY-grafana