diff --git a/infrastructure/monitoring/release.yaml b/infrastructure/monitoring/release.yaml
index 8ebc8e522560f8180c25a2ac112402e5a5104a12..0c08e45cc2b782bfb733b9dfcf297c852ba9a9bf 100644
--- a/infrastructure/monitoring/release.yaml
+++ b/infrastructure/monitoring/release.yaml
@@ -52,7 +52,15 @@ spec:
       alertmanagerSpec:
         replicas: 1
         retention: 120h
-        storage: {}
+        storage:
+          volumeClaimTemplate:
+            spec:
+              storageClassName: longhorn
+              accessModes: ["ReadWriteOnce"]
+              resources:
+                requests:
+                  storage: 1Gi
+
         resources:
          requests:
            memory: 400Mi