diff --git a/spring-cloud-commons/src/main/java/org/springframework/cloud/client/DefaultServiceInstance.java b/spring-cloud-commons/src/main/java/org/springframework/cloud/client/DefaultServiceInstance.java
index b41701d2..a8bbc0ac 100644
--- a/spring-cloud-commons/src/main/java/org/springframework/cloud/client/DefaultServiceInstance.java
+++ b/spring-cloud-commons/src/main/java/org/springframework/cloud/client/DefaultServiceInstance.java
@@ -17,8 +17,8 @@
 package org.springframework.cloud.client;
 
 import java.net.URI;
-import java.util.Arrays;
 import java.util.LinkedHashMap;
+import java.util.List;
 import java.util.Map;
 import java.util.Objects;
 
@@ -33,6 +33,8 @@ import java.util.Objects;
  */
 public class DefaultServiceInstance implements ServiceInstance {
 
+	private final List<String> secureSchemes = List.of("https", "wss");
+
 	private String instanceId;
 
 	private String serviceId;
@@ -49,6 +51,7 @@ public class DefaultServiceInstance implements ServiceInstance {
 
 	private URI uri;
 
+
 	/**
 	 * @param instanceId the id of the instance.
 	 * @param serviceId the id of the service.
@@ -181,7 +184,7 @@ public class DefaultServiceInstance implements ServiceInstance {
 		this.host = this.uri.getHost();
 		this.port = this.uri.getPort();
 		scheme = this.uri.getScheme();
-		if (Arrays.asList("https", "wss").contains(scheme)) {
+		if (secureSchemes.contains(scheme)) {
 			this.secure = true;
 		}
 	}