diff --git a/clusters/base/infra/metallb/config.yaml b/clusters/base/infra/metallb/config.yaml
index 669bf45..b4d1518 100644
--- a/clusters/base/infra/metallb/config.yaml
+++ b/clusters/base/infra/metallb/config.yaml
@@ -7,7 +7,7 @@ metadata:
 spec:
   addresses:
     # exclude 10.0.64.5, its in nfs-pool
-    - 10.0.64.6
+    - 10.0.64.6/32
     # exclude 10.0.64.7, its in dmz-pool
     # exclude 10.0.64.8, its in mqtt-pool
     - 10.0.64.9-10.0.64.19