diff --git a/bindep.txt b/bindep.txt
index ba2ccb4b..9cce56b5 100644
--- a/bindep.txt
+++ b/bindep.txt
@@ -2,3 +2,4 @@ libxml2-dev [platform:dpkg test]
 libxslt1-dev [platform:dpkg test]
 build-essential [platform:dpkg test]
 zlib1g-dev [platform:dpkg test]
+libffi-dev [platform:dpkg test]
diff --git a/src/ceph_metrics.py b/src/ceph_metrics.py
index 472f8fff..0c320451 100644
--- a/src/ceph_metrics.py
+++ b/src/ceph_metrics.py
@@ -66,6 +66,7 @@ class CephMetricsEndpointProvider(prometheus_scrape.MetricsEndpointProvider):
             )
             ceph_utils.mgr_enable_module("prometheus")
             logger.debug("module_enabled")
+            self.update_alert_rules()
             super()._on_relation_changed(event)
 
     def _on_relation_departed(self, event):