diff --git a/dist/rules/postgresql/postgres-exporter.yml b/dist/rules/postgresql/postgres-exporter.yml
index 2c4a793..e9dc0b5 100644
--- a/dist/rules/postgresql/postgres-exporter.yml
+++ b/dist/rules/postgresql/postgres-exporter.yml
@@ -50,7 +50,7 @@ groups:
         description: "Table {{ $labels.relname }} has not been auto analyzed for 10 days\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"
 
     - alert: PostgresqlTooManyConnections
-      expr: ''
+      expr: 'sum by (instance, job, server) (pg_stat_activity_count) > min by (instance, job, server) (pg_settings_max_connections * 0.8)'
       for: 2m
       labels:
         severity: warning