diff --git a/hosts/monitoring-3/rules.yml b/hosts/monitoring-3/rules.yml
index f9bb742..2ed0b6b 100644
--- a/hosts/monitoring-3/rules.yml
+++ b/hosts/monitoring-3/rules.yml
@@ -102,3 +102,11 @@ groups:
     annotations:
       summary: "Too many notification requests failed"
       description: "Too many notification requests to Alertmanager integration {{ $labels.integration }} failed"
+  - alert: FemSocialDown
+    expr: min(probe_success{target="fem.social", job=~"blackbox_local_http.*"}) == 0
+    for: 5m
+    labels:
+      severity: critical
+    annotations:
+      summary: "fem.social unavailable via HTTP"
+      description: "fem.social is not fully reachable via HTTP"