diff --git a/infrastructure/grafana/dashboards/planner.json b/infrastructure/grafana/dashboards/planner.json
index 084fa8e..97aa026 100644
--- a/infrastructure/grafana/dashboards/planner.json
+++ b/infrastructure/grafana/dashboards/planner.json
@@ -109,7 +109,7 @@
       },
       "targets": [
         {
-          "expr": "sum(rate(overpass_upstream_requests_total{status=~\"2..\"}[5m])) / clamp_min(sum(rate(overpass_upstream_requests_total[5m])), 1)",
+          "expr": "(sum(rate(overpass_upstream_requests_total{status=~\"2..\"}[5m])) or vector(0)) / sum(rate(overpass_upstream_requests_total[5m]))",
           "legendFormat": "success"
         }
       ],
@@ -140,7 +140,7 @@
       },
       "targets": [
         {
-          "expr": "sum(rate(overpass_cache_events_total{result=\"hit\"}[5m])) / clamp_min(sum(rate(overpass_cache_events_total[5m])), 1)",
+          "expr": "(sum(rate(overpass_cache_events_total{result=\"hit\"}[5m])) or vector(0)) / sum(rate(overpass_cache_events_total[5m]))",
           "legendFormat": "hit ratio"
         }
       ],