diff --git a/charts/mailproxy/v0.1.0/templates/nginx-deployment.yaml b/charts/mailproxy/v0.1.0/templates/nginx-deployment.yaml
index 8257698..d540e85 100644
--- a/charts/mailproxy/v0.1.0/templates/nginx-deployment.yaml
+++ b/charts/mailproxy/v0.1.0/templates/nginx-deployment.yaml
@@ -67,17 +67,19 @@ spec:
       affinity:
         podAntiAffinity:
           preferredDuringSchedulingIgnoredDuringExecution:
-            - labelSelector:
-                matchExpressions:
-                  - key: app.kubernetes.io/name
-                    operator: In
-                    values:
-                      - {{ include "mailproxy.name" . }}
-                  - key: app.kubernetes.io/instance
-                    operator: In
-                    values:
-                      - {{ .Release.Name }}
-              topologyKey: "kubernetes.io/hostname"
+            - weight: 100
+              podAffinityTerm:
+                labelSelector:
+                  matchExpressions:
+                    - key: app.kubernetes.io/name
+                      operator: In
+                      values:
+                        - {{ include "mailproxy.name" . }}
+                    - key: app.kubernetes.io/instance
+                      operator: In
+                      values:
+                        - {{ .Release.Name }}
+                topologyKey: "kubernetes.io/hostname"
       {{- with .Values.tolerations }}
       tolerations:
         {{- toYaml . | nindent 8 }}