diff --git a/manifests/main/yumrepo.pp b/manifests/main/yumrepo.pp
index 2ebd8c4..48ce926 100644
--- a/manifests/main/yumrepo.pp
+++ b/manifests/main/yumrepo.pp
@@ -12,7 +12,7 @@ class prometheus_cd::main::yumrepo (
     baseurl  => 'https://packagecloud.io/prometheus-rpm/release/el/9/$basearch',
     gpgkey   => 'https://packagecloud.io/prometheus-rpm/release/gpgkey',
     enabled  => '1',
-    gpgcheck => '0',
+    gpgcheck => '1',
     target   => '/etc/yum.repo.d/prometheus.repo',
   }
 }