diff --git a/_data/rules.yml b/_data/rules.yml
index 065d9bf..2d8ffa7 100644
--- a/_data/rules.yml
+++ b/_data/rules.yml
@@ -303,7 +303,7 @@ services:
           - name: Volume full in four days
             description: "{{ $labels.namespace }}/{{ $labels.persistentvolumeclaim }} is expected to fill up within four days. Currently {{ $value | humanize }}% is available."
             query: '100 * (kubelet_volume_stats_available_bytes / kubelet_volume_stats_capacity_bytes) < 15 and predict_linear(kubelet_volume_stats_available_bytes[6h], 4 * 24 * 3600) < 0'
-            severity: critical
+            severity: error
 
   - name: Nomad
     exporters: