diff --git a/README.md b/README.md
index 23e9f212..1eb52bbe 100644
--- a/README.md
+++ b/README.md
@@ -192,7 +192,7 @@ data:
   ipv4-svc-cidr: "10.96.0.0/16"
   ipv4-join-cidr: "100.64.0.0/16"
   ipv4-external-pool-private: "192.168.100.200-192.168.100.250"
-  ipv4-external-pool-public: "1.2.3.4,1.2.3.5"
+  ipv4-external-pool-public: "1.2.3.4/32,1.2.3.5/32"
   monitoring-remote-write-url-1: "http://vminsert-monitoring-system-shortterm.tenant-root.svc:8480/insert/0/prometheus/api/v1/write"
   monitoring-remote-write-url-2: "http://vminsert-monitoring-system-longterm.tenant-root.svc:8480/insert/0/prometheus/api/v1/write"
 EOT