diff --git a/spring-web/src/main/java/org/springframework/web/util/HierarchicalUriComponents.java b/spring-web/src/main/java/org/springframework/web/util/HierarchicalUriComponents.java
index f3a5ec9013b..103784e9c29 100644
--- a/spring-web/src/main/java/org/springframework/web/util/HierarchicalUriComponents.java
+++ b/spring-web/src/main/java/org/springframework/web/util/HierarchicalUriComponents.java
@@ -41,6 +41,7 @@ import org.springframework.util.StringUtils;
  * @since 3.1.3
  * @see <a href="http://tools.ietf.org/html/rfc3986#section-1.2.3">Hierarchical URIs</a>
  */
+@SuppressWarnings("serial")
 final class HierarchicalUriComponents extends UriComponents {
 
 	private static final char PATH_DELIMITER = '/';
diff --git a/spring-web/src/main/java/org/springframework/web/util/OpaqueUriComponents.java b/spring-web/src/main/java/org/springframework/web/util/OpaqueUriComponents.java
index d896518b29a..6e51c77dffd 100644
--- a/spring-web/src/main/java/org/springframework/web/util/OpaqueUriComponents.java
+++ b/spring-web/src/main/java/org/springframework/web/util/OpaqueUriComponents.java
@@ -33,6 +33,7 @@ import org.springframework.util.ObjectUtils;
  * @since 3.2
  * @see <a href="http://tools.ietf.org/html/rfc3986#section-1.2.3">Hierarchical vs Opaque URIs</a>
  */
+@SuppressWarnings("serial")
 final class OpaqueUriComponents extends UriComponents {
 
 	private static final MultiValueMap<String, String> QUERY_PARAMS_NONE = new LinkedMultiValueMap<String, String>(0);