diff --git a/spring-cloud-gateway-server/src/main/java/org/springframework/cloud/gateway/filter/factory/SecureHeadersProperties.java b/spring-cloud-gateway-server/src/main/java/org/springframework/cloud/gateway/filter/factory/SecureHeadersProperties.java
index e3fc3d3a..6802575a 100644
--- a/spring-cloud-gateway-server/src/main/java/org/springframework/cloud/gateway/filter/factory/SecureHeadersProperties.java
+++ b/spring-cloud-gateway-server/src/main/java/org/springframework/cloud/gateway/filter/factory/SecureHeadersProperties.java
@@ -35,15 +35,12 @@ public class SecureHeadersProperties {
 	/**
 	 * Strict transport security header default.
 	 */
-	public static final String STRICT_TRANSPORT_SECURITY_HEADER_DEFAULT = "max-age=631138519"; // ;
-																								// includeSubDomains
-																								// preload")
+	public static final String STRICT_TRANSPORT_SECURITY_HEADER_DEFAULT = "max-age=631138519";
 
 	/**
 	 * Frame Options header default.
 	 */
-	public static final String X_FRAME_OPTIONS_HEADER_DEFAULT = "DENY"; // SAMEORIGIN =
-																		// ALLOW-FROM
+	public static final String X_FRAME_OPTIONS_HEADER_DEFAULT = "DENY";
 
 	/**
 	 * Content-Type Options header default.
@@ -53,19 +50,7 @@ public class SecureHeadersProperties {
 	/**
 	 * Referrer Policy header default.
 	 */
-	public static final String REFERRER_POLICY_HEADER_DEFAULT = "no-referrer"; // no-referrer-when-downgrade
-																				// =
-																				// origin
-																				// =
-																				// origin-when-cross-origin
-																				// =
-																				// same-origin
-																				// =
-																				// strict-origin
-																				// =
-																				// strict-origin-when-cross-origin
-																				// =
-																				// unsafe-url
+	public static final String REFERRER_POLICY_HEADER_DEFAULT = "no-referrer";
 
 	/**
 	 * Content-Security Policy header default.