src/java.base/share/classes/java/lang/Boolean.java

*** 71,80 ****
--- 71,81 ----
       * @serial
       */
      private final boolean value;
  
      /** use serialVersionUID from JDK 1.0.2 for interoperability */
+     @java.io.Serial
      private static final long serialVersionUID = -3665804199014368530L;
  
      /**
       * Allocates a {@code Boolean} object representing the
       * {@code value} argument.