diff --git a/stretch/preferences.d/stretch-backports b/stretch/preferences.d/stretch-backports
index db52476..0fd6d2e 100644
--- a/stretch/preferences.d/stretch-backports
+++ b/stretch/preferences.d/stretch-backports
@@ -97,3 +97,7 @@ Pin-Priority: 900
 Package: python3-certbot-dns-rfc2136
 Pin: release a=stretch-backports
 Pin-Priority: 900
+
+Package: prometheus*
+Pin: release a=stretch-backports
+Pin-Priority: 900