diff --git a/README.md b/README.md
index 62696fa..46771ac 100644
--- a/README.md
+++ b/README.md
@@ -649,6 +649,7 @@ Chart configuration is as follows:
 | `autoscaling.targetMemoryUtilizationPercentage` | `""` | When to scale up |
 | `autoscaling.labels` | `{}` | Additional HPA labels |
 | `autoscaling.annotations` | `{}` | Additional HPA annotations |
+| `autoscaling.behavior` | `{}` | [Configurable scaling behavior](https://kubernetes.io/docs/concepts/workloads/autoscaling/horizontal-pod-autoscale/#configurable-scaling-behavior) |
 | `nodeSelector` | `{}` | Standard Kubernetes stuff |
 | `tolerations` | `[]` | Standard Kubernetes stuff |
 | `affinity` | `{}` | Standard Kubernetes stuff |
diff --git a/helm/mail/templates/hpa.yaml b/helm/mail/templates/hpa.yaml
index 212c53b..4dfcfda 100644
--- a/helm/mail/templates/hpa.yaml
+++ b/helm/mail/templates/hpa.yaml
@@ -42,6 +42,10 @@ spec:
           type: Utilization
           averageUtilization: {{ .Values.autoscaling.targetMemoryUtilizationPercentage }}
   {{- end }}
+  {{- with .Values.autoscaling.behavior }}
+  behavior:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
   {{- else }}
   {{- if .Values.autoscaling.targetCPUUtilizationPercentage }}
     - type: Resource
diff --git a/helm/mail/values.yaml b/helm/mail/values.yaml
index b0f09bc..96baf9d 100644
--- a/helm/mail/values.yaml
+++ b/helm/mail/values.yaml
@@ -106,6 +106,7 @@ autoscaling:
   # targetMemoryUtilizationPercentage: 80
   labels: {}
   annotations: {}
+  behavior: {}
 
 nodeSelector: {}
 tolerations: []