--- old/src/java.base/share/classes/java/net/URLPermission.java	2019-08-27 17:28:06.426324386 -0700
+++ new/src/java.base/share/classes/java/net/URLPermission.java	2019-08-27 17:28:06.234324386 -0700
@@ -151,6 +151,7 @@
  */
 public final class URLPermission extends Permission {
 
+    @java.io.Serial
     private static final long serialVersionUID = -2702463814894478682L;
 
     private transient String scheme;
@@ -505,6 +506,7 @@
     /**
      * restore the state of this object from stream
      */
+    @java.io.Serial
     private void readObject(ObjectInputStream s)
         throws IOException, ClassNotFoundException {
         ObjectInputStream.GetField fields = s.readFields();